← 62 63 64 →
← 60 61 62 63 64 65 66 67 68 69 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	sixty-three
Ordinal	63rd (sixty-third)
Factorization	32 × 7
Divisors	1, 3, 7, 9, 21, 63
Greek numeral	ΞΓ´
Roman numeral	LXIII
Binary	1111112
Ternary	21003
Quaternary	3334
Quinary	2235
Senary	1436
Octal	778
Duodecimal	5312
Hexadecimal	3F16
Vigesimal	3320
Base 36	1R36

63 (sixty-three) is the natural number following 62 and preceding 64.

In mathematics

63 is:

• a deficient composite number

• a highly cototient number.^[1]
• a number of the form 2ⁿ − 1 (with n = 6), but it is not a Mersenne prime since n is not prime and 63 is certainly not prime either. It is the only number in the Mersenne sequence whose prime factors are each factors of at least one previous element of the sequence.
• a Woodall number i.e. of the form 2ⁿn − 1 with n = 4.^[2]
• the third Delannoy number.^[3]
• the sum of the powers of 2 from 0 to 5.
• palindromic and a repdigit in bases 2 (111111₂), 4 (333₄), 8 (77₈), 20 (33₂₀) and 62 (11₆₂).
• a centered octahedral number.^[4]
• there are 63 posets with 5 unlabeled elements.^[5]
• a Harshad number.

In science

• The atomic number of europium.

Astronomy

• Messier object M63, a magnitude 8.5 galaxy in the constellation Canes Venatici, also known as the Sunflower Galaxy.
• The New General Catalogue object NGC 63, a spiral galaxy in the constellation Pisces

In other fields

Sixty-three is also:

• The code for international direct dial calls to the Philippines
• The hull number 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 Puy-de-Dôme
• The number of groats in a guinea in British pre-decimal currency
• A card game, popular in Carleton County, New Brunswick
• The Stoner 63, a machine gun
• The number of chromosomes found in the offspring of a donkey and a horse
• Class of '63 was a TV movie starring James Brolin (1973)

In sports

• Tom Dempsey of New Orleans Saints, Nov. 8, 1970, Jason Elam of the Denver Broncos, Oct. 25, 1988, Sebastian Janikowski of the Oakland Raiders, Sep. 12, 2011 and David Akers^[6] of the San Francisco 49ers, Sept. 9, 2012 had NFL record 63-yard field goals
• Michael Jordan scored a record 63 points in a Chicago Bulls–Boston Celtics (double-overtime) NBA playoff game on April 20, 1987
• In U.S. college athletics, schools that are members of NCAA Division I FCS are allowed to provide their football players with athletically-related financial aid equivalent to a total of 63 full athletic scholarships in a given season.
• Cricketer Phillip Hughes died during a match whilst on a personal score of 63 runs.

In religion

• There are 63 Tractates in the Mishna, the compilation of Jewish Law.
• There are 63 Saints (popularly known as Nayanmars) in South Indian Shaivism, particularly in Tamil Nadu, India .
• There are 63 Salakapurusas (great beings) in Jain cosmology.

References

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