ⓘ 63 (number)


ⓘ 63 (number)

63 is:

  • the smallest whole number that can be divided by any number from 1 to 9 without repeating decimals.
  • a Woodall number i.e. of the form 2 n − 1 with n = 4.
  • a highly cototient number.
  • the third Delannoy number.
  • palindromic and a repdigit in bases 2 111111 2, 4 333 4, 8 77 8, 20 33 20 and 62 11 62.
  • a number of the form 2 n − 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 deficient composite number.
  • the sum of the powers of 2 from 0 to 5.

1. In science

  • The atomic number of europium, a lanthanide


  • 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

2. In other fields

Sixty-three is also:

  • The number of the French department Puy-de-Dome
  • Class of 63 was a TV movie starring James Brolin 1973
  • The Stoner 63, a machine gun
  • A card game, popular in Carleton County, New Brunswick
  • The hull number of the U.S. Navys aircraft carrier USS Kitty Hawk CV-63 and the USS Missouri BB63
  • The number of groats in a guinea in British pre-decimal currency
  • The code for international direct dial calls to the Philippines
  • The number of chromosomes found in the offspring of a donkey and a horse

3. In sports

  • Michael Jordan scored a record 63 points in a Chicago Bulls –Boston Celtics double-overtime NBA playoff game on April 20, 1986
  • 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.
  • 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 of the San Francisco 49ers, Sept. 9, 2012 had NFL record 63-yard field goals
  • Cricketer Phillip Hughes died during a match whilst on a personal score of 63 runs.

4. In Religion

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