56999999904 has 24 divisors (see below), whose sum is σ = 149625000000. Its totient is φ = 18999999936.

The previous prime is 56999999879. The next prime is 56999999939. The reversal of 56999999904 is 40999999965.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 56999999904.

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 3 ways as a sum of consecutive naturals, for example, 296874904 + ... + 296875095.

It is an arithmetic number, because the mean of its divisors is an integer number (6234375000).

Almost surely, 2^56999999904 is an apocalyptic number.

It is an amenable number.

56999999904 is an abundant number, since it is smaller than the sum of its proper divisors (92625000096).

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

56999999904 is a wasteful number, since it uses less digits than its factorization.

56999999904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593750012 (or 593750004 counting only the distinct ones).

The product of its (nonzero) digits is 573956280, while the sum is 78.

It can be divided in two parts, 569999 and 99904, that added together give a triangular number (669903 = T₁₁₅₇).

The spelling of 56999999904 in words is "fifty-six billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred four".