56438537904 has 90 divisors (see below), whose sum is σ = 183737218860. Its totient is φ = 16125294528.

The previous prime is 56438537867. The next prime is 56438537923. The reversal of 56438537904 is 40973583465.

56438537904 is a `hidden beast` number, since 564 + 3 + 8 + 5 + 3 + 79 + 0 + 4 = 666.

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 17 ways as a sum of consecutive naturals, for example, 3992274 + ... + 4006385.

It is an arithmetic number, because the mean of its divisors is an integer number (2041524654).

Almost surely, 2^56438537904 is an apocalyptic number.

It is an amenable number.

56438537904 is an abundant number, since it is smaller than the sum of its proper divisors (127298680956).

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

56438537904 is a wasteful number, since it uses less digits than its factorization.

56438537904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998687 (or 7998671 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 56438537904 in words is "fifty-six billion, four hundred thirty-eight million, five hundred thirty-seven thousand, nine hundred four".