56905791018 has 32 divisors (see below), whose sum is σ = 117831667200. Its totient is φ = 18302215680.

The previous prime is 56905791001. The next prime is 56905791037. The reversal of 56905791018 is 81019750965.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391243 + ... + 516606.

It is an arithmetic number, because the mean of its divisors is an integer number (3682239600).

Almost surely, 2^56905791018 is an apocalyptic number.

56905791018 is an abundant number, since it is smaller than the sum of its proper divisors (60925876182).

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

56905791018 is a wasteful number, since it uses less digits than its factorization.

56905791018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908222.

The product of its (nonzero) digits is 680400, while the sum is 51.

The spelling of 56905791018 in words is "fifty-six billion, nine hundred five million, seven hundred ninety-one thousand, eighteen".