63 (sixty-three) is the

natural number In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''Cardinal n ...

following 62 and preceding 64.

In mathematics

63 is: * a deficient

composite Composite or compositing may refer to: Materials * Composite material, a material that is made from several different substances ** Metal matrix composite, composed of metal and other parts ** Cermet, a composite of ceramic and metallic materials ...

number * a

highly cototient number In number theory, a branch of mathematics, a highly cototient number is a positive integer k which is above 1 and has more solutions to the equation :x - \phi(x) = k than any other integer below k and above 1. Here, \phi is Euler's totient fun ...

. * a number of the form 2^''n'' − 1 (with ''n'' = 6), but it is not a

Mersenne prime In mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form for some integer . They are named after Marin Mersenne, a French Minim friar, who studied them in the early 17t ...

since n is not

prime A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways ...

and 63 is certainly not prime either. It is the only number in the Mersenne sequence whose

prime factor A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways ...

s are each factors of at least one previous element of the sequence. * a

Woodall number In number theory, a Woodall number (''W'n'') is any natural number of the form :W_n = n \cdot 2^n - 1 for some natural number ''n''. The first few Woodall numbers are: :1, 7, 23, 63, 159, 383, 895, … . History Woodall numbers were first st ...

i.e. of the form 2^''n''''n'' − 1 with ''n'' = 4. * the third

Delannoy number In mathematics, a Delannoy number D describes the number of paths from the southwest corner (0, 0) of a rectangular grid to the northeast corner (''m'', ''n''), using only single steps north, northeast, or east. The Delannoy numbers are named aft ...

. * the sum of the powers of 2 from 0 to 5. * palindromic and a

repdigit In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal). The word is a portmanteau of repeated and digit. Example ...

in bases 2 (111111₂), 4 (333₄), 8 (77₈), 20 (33₂₀) and 62 (11₆₂). * a

centered octahedral number A centered octahedral number or Haüy octahedral number is a figurate number that counts the number of points of a three-dimensional integer lattice that lie inside an octahedron centered at the origin. The same numbers are special cases of t ...

. * there are 63 posets with 5 unlabeled elements. * a Harshad number.

In science

* The

atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...

europium Europium is a chemical element with the symbol Eu and atomic number 63. Europium is the most reactive lanthanide by far, having to be stored under an inert fluid to protect it from atmospheric oxygen or moisture. Europium is also the softest lanth ...

Astronomy

Messier object The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ''Catalogue des Nébuleuses et des Amas d'Étoiles'' (''Catalogue of Nebulae and Star Clusters''). Because Messier was only int ...

M63, a

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

8.5

galaxy A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

Canes Venatici Canes Venatici () is one of the IAU designated constellations, 88 constellations designated by the International Astronomical Union (IAU). It is a small northern constellation that was created by Johannes Hevelius in the 17th century. Its name is ...

, also known as the

Sunflower Galaxy Messier 63 or M63, also known as NGC 5055 or the seldom-used Sunflower Galaxy, is a spiral galaxy in the northern constellation of Canes Venatici with approximately 400 billion stars. M63 was first discovered by the French astronomer Pierre M� ...

. * The

New General Catalogue The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...

br>object
NGC 63, a

spiral galaxy Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Pisces Pisces may refer to: * Pisces, an obsolete (because of land vertebrates) taxonomic superclass including all fish * Pisces (astrology), an astrological sign * Pisces (constellation), a constellation **Pisces Overdensity, an overdensity of stars in ...

In other fields

Sixty-three is also: * The

code for international direct dial Country calling codes or country dial-in codes are telephone number prefixes for reaching telephone subscribers in the networks of the member countries or regions of the International Telecommunication Union (ITU). The codes are defined by the ...

calls to the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

* The

hull number Hull number is a serial identification number given to a boat or ship. For the military, a lower number implies an older vessel. For civilian use, the HIN is used to trace the boat's history. The precise usage varies by country and type. United S ...

of the U.S. Navy's aircraft carrier USS ''Kitty Hawk'' (CV-63) and the USS ''Missouri'' (BB-63) * The number of the

French department In the administrative divisions of France, the department (french: département, ) is one of the three levels of government under the national level ("territorial collectivities"), between the administrative regions and the communes. Ninety-s ...

Puy-de-Dôme Puy-de-Dôme (; oc, label=Auvergnat, lo Puèi de Doma or ''lo Puèi Domat'') is a department in the Auvergne-Rhône-Alpes region in the centre of France. In 2019, it had a population of 662,152.groats Groats (or in some cases, "berries") are the hulled kernels of various cereal grains, such as oat, wheat, rye, and barley. Groats are whole grains that include the cereal germ and fiber-rich bran portion of the grain, as well as the endospe ...

in a

guinea Guinea ( ),, fuf, 𞤘𞤭𞤲𞤫, italic=no, Gine, wo, Gine, nqo, ߖߌ߬ߣߍ߫, bm, Gine officially the Republic of Guinea (french: République de Guinée), is a coastal country in West Africa. It borders the Atlantic Ocean to the we ...

in British pre-decimal currency * A card game, popular in

Carleton County Carleton County (2016 population 26,220) is located in west-central New Brunswick, Canada. The western border is Aroostook County, Maine, the northern border is Victoria County, and the southeastern border is York County from which it was fo ...

New Brunswick New Brunswick (french: Nouveau-Brunswick, , locally ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. It is the only province with both English and ...

* The

Stoner 63 The Stoner 63 is a 5.56×45mm NATO modular weapon system. Using a variety of modular components, it can be configured as an assault rifle, carbine, top-fed light machine gun, belt-fed squad automatic weapon, or as a vehicle mounted weapon. Also ...

, a

machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) a ...

* The number of

chromosomes A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are ...

found in the offspring of a

donkey The domestic donkey is a hoofed mammal in the family Equidae, the same family as the horse. It derives from the African wild ass, ''Equus africanus'', and may be classified either as a subspecies thereof, ''Equus africanus asinus'', or as a ...

and a

horse The horse (''Equus ferus caballus'') is a domesticated, one-toed, hoofed mammal. It belongs to the taxonomic family Equidae and is one of two extant subspecies of ''Equus ferus''. The horse has evolved over the past 45 to 55 million y ...

* ''Class of '63'' was a TV movie starring

James Brolin James Brolin (, born Craig Kenneth Bruderlin; July 18, 1940) is an American actor. Brolin has won two Golden Globes and an Emmy. He received a star on the Hollywood Walk of Fame on August 27, 1998. He is the father of actor Josh Brolin. He ...

(1973)

In sports

Tom Dempsey Thomas John Dempsey (January 12, 1947April 4, 2020) was an American professional football player who was a placekicker in the National Football League (NFL) for the New Orleans Saints, Philadelphia Eagles, Los Angeles Rams, Houston Oilers and ...

New Orleans Saints The New Orleans Saints are a professional American football team based in New Orleans. The Saints compete in the National Football League (NFL) as a member of the league's National Football Conference (NFC) South division. Since 1975, the te ...

, Nov. 8, 1970,

Jason Elam Jason Elam (born March 8, 1970) is a former American football placekicker. He was drafted by the Denver Broncos in the third round of the 1993 NFL Draft and played 15 seasons with the Broncos and two with the Atlanta Falcons. A three-time Pro B ...

of the

Denver Broncos The Denver Broncos are a professional American football franchise based in Denver. The Broncos compete in the National Football League (NFL) as a member club of the league's American Football Conference (AFC) West division. The team is headquart ...

, Oct. 25, 1988,

Sebastian Janikowski Sebastian Paweł Janikowski (; born March 2, 1978) is a Polish former American football placekicker who played in the National Football League (NFL) for 18 seasons, primarily with the Oakland Raiders. He played college football at Florida State ...

of the

Oakland Raiders The Oakland Raiders were a professional American football team that played in Oakland from its founding in 1960 to 1981 and again from 1995 to 2019 before relocating to the Las Vegas metropolitan area where they now play as the Las Vegas Raide ...

, Sep. 12, 2011 and

David Akers David Roy Akers (; born December 9, 1974) is an American former football placekicker who played in the National Football League (NFL) for 16 seasons, primarily with the Philadelphia Eagles. He began his career in 1998 with the Washington Redski ...

of the

San Francisco 49ers The San Francisco 49ers (also written as the San Francisco Forty-Niners) are a professional American football team based in the San Francisco Bay Area. The 49ers compete in the National Football League (NFL) as a member of the league's National ...

, Sept. 9, 2012 had NFL record 63-yard field goals *

Michael Jordan Michael Jeffrey Jordan (born February 17, 1963), also known by his initials MJ, is an American businessman and former professional basketball player. His biography on the official NBA website states: "By acclamation, Michael Jordan is the g ...

scored a record 63 points in a

Chicago Bulls The Chicago Bulls are an American professional basketball team based in Chicago. The Bulls compete in the National Basketball Association (NBA) as a member of the league's Eastern Conference Central Division. The team was founded on January 1 ...

–

Boston Celtics The Boston Celtics ( ) are an American professional basketball team based in Boston. The Celtics compete in the National Basketball Association (NBA) as a member of the league's Eastern Conference Atlantic Division. Founded in 1946 as one of t ...

(double-overtime) NBA playoff game on April 20, 1987 * In U.S. college athletics, schools that are members of

NCAA Division I NCAA Division I (D-I) is the highest level of College athletics, intercollegiate athletics sanctioned by the National Collegiate Athletic Association (NCAA) in the United States, which accepts players globally. D-I schools include the major ...

FCS are allowed to provide their

football Football is a family of team sports that involve, to varying degrees, kicking a ball to score a goal. Unqualified, the word ''football'' normally means the form of football that is the most popular where the word is used. Sports commonly c ...

players with athletically-related financial aid equivalent to a total of 63 full

athletic scholarship An athletic scholarship is a form of scholarship to attend a college or university or a private high school awarded to an individual based predominantly on his or her ability to play in a sport. Athletic scholarships are common in the United Stat ...

s in a given season. * Cricketer

Phillip Hughes Phillip Joel Hughes (30 November 1988 – 27 November 2014) was an Australian Test and One Day International (ODI) cricketer who played domestic cricket for South Australia and Worcestershire. He was a left-handed opening batsman who play ...

died during a match whilst on a personal score of 63 runs.

In Religion

* There are 63 Tractates in the

Mishna The Mishnah or the Mishna (; he, מִשְׁנָה, "study by repetition", from the verb ''shanah'' , or "to study and review", also "secondary") is the first major written collection of the Jewish oral traditions which is known as the Oral Torah ...

, the compilation of Jewish Law. * There are 63 Saints (popularly known as

Nayanmars The Nayanars (or Nayanmars; ta, நாயன்மார், translit=Nāyaṉmār, translit-std=ISO, lit=hounds of Siva, and later 'teachers of Shiva ) were a group of 63 Tamil Hindu saints living during the 6th to 8th centuries CE who were de ...

) in South Indian

Shaivism Shaivism (; sa, शैवसम्प्रदायः, Śaivasampradāyaḥ) is one of the major Hindu traditions, which worships Shiva as the Supreme Being. One of the largest Hindu denominations, it incorporates many sub-traditions rangi ...

, particularly in

Tamil Nadu Tamil Nadu (; , TN) is a States and union territories of India, state in southern India. It is the List of states and union territories of India by area, tenth largest Indian state by area and the List of states and union territories of India ...

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

. * There are 63 Salakapurusas (great beings) in Jain cosmology. * Muhammad died at the age of 63

References

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