56638929904 has 20 divisors (see below), whose sum is σ = 110112467976. Its totient is φ = 28222809152.

The previous prime is 56638929899. The next prime is 56638929961. The reversal of 56638929904 is 40992983665.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6036154 + ... + 6045529.

Almost surely, 2^56638929904 is an apocalyptic number.

It is an amenable number.

56638929904 is a deficient number, since it is larger than the sum of its proper divisors (53473538072).

56638929904 is a wasteful number, since it uses less digits than its factorization.

56638929904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12081984 (or 12081978 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 61.

The spelling of 56638929904 in words is "fifty-six billion, six hundred thirty-eight million, nine hundred twenty-nine thousand, nine hundred four".