12639707990 has 32 divisors (see below), whose sum is σ = 28001816640. Its totient is φ = 4000258944.

The previous prime is 12639707981. The next prime is 12639708013. The reversal of 12639707990 is 9970793621.

It is a happy number.

12639707990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6943985 + ... + 6945804.

It is an arithmetic number, because the mean of its divisors is an integer number (875056770).

Almost surely, 2^12639707990 is an apocalyptic number.

12639707990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12639707990 is an abundant number, since it is smaller than the sum of its proper divisors (15362108650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12639707990 is a wasteful number, since it uses less digits than its factorization.

12639707990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13889816.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 12639707990 in words is "twelve billion, six hundred thirty-nine million, seven hundred seven thousand, nine hundred ninety".