56921040836 has 24 divisors (see below), whose sum is σ = 110509267680. Its totient is φ = 25434670400.

The previous prime is 56921040797. The next prime is 56921040853. The reversal of 56921040836 is 63804012965.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10960625 + ... + 10965816.

It is an arithmetic number, because the mean of its divisors is an integer number (4604552820).

Almost surely, 2^56921040836 is an apocalyptic number.

It is an amenable number.

56921040836 is a deficient number, since it is larger than the sum of its proper divisors (53588226844).

56921040836 is a wasteful number, since it uses less digits than its factorization.

56921040836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21926515 (or 21926513 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 56921040836 in words is "fifty-six billion, nine hundred twenty-one million, forty thousand, eight hundred thirty-six".