56637056538 has 24 divisors (see below), whose sum is σ = 122786171508. Its totient is φ = 18867857472.

The previous prime is 56637056527. The next prime is 56637056551. The reversal of 56637056538 is 83565073665.

56637056538 is a `hidden beast` number, since 5 + 6 + 6 + 3 + 70 + 565 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 48159619209 + 8477437329 = 219453^2 + 92073^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 898795 + ... + 959742.

Almost surely, 2^56637056538 is an apocalyptic number.

56637056538 is an abundant number, since it is smaller than the sum of its proper divisors (66149114970).

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

56637056538 is a wasteful number, since it uses less digits than its factorization.

56637056538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860238 (or 1860235 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 56637056538 in words is "fifty-six billion, six hundred thirty-seven million, fifty-six thousand, five hundred thirty-eight".