56997787500 has 108 divisors (see below), whose sum is σ = 180086005008. Its totient is φ = 15199380000.

The previous prime is 56997787489. The next prime is 56997787519. The reversal of 56997787500 is 578779965.

56997787500 is a `hidden beast` number, since 56 + 9 + 9 + 7 + 78 + 7 + 500 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 140824 + ... + 365823.

Almost surely, 2^56997787500 is an apocalyptic number.

56997787500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56997787500 is an abundant number, since it is smaller than the sum of its proper divisors (123088217508).

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

56997787500 is a wasteful number, since it uses less digits than its factorization.

56997787500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506682 (or 506657 counting only the distinct ones).

The product of its (nonzero) digits is 33339600, while the sum is 63.

The spelling of 56997787500 in words is "fifty-six billion, nine hundred ninety-seven million, seven hundred eighty-seven thousand, five hundred".