56908322991 has 18 divisors (see below), whose sum is σ = 89010456288. Its totient is φ = 35020505520.

The previous prime is 56908322983. The next prime is 56908322993. The reversal of 56908322991 is 19922380965.

It is a happy number.

It is not a de Polignac number, because 56908322991 - 2³ = 56908322983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56908322993) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18706015 + ... + 18709056.

Almost surely, 2^56908322991 is an apocalyptic number.

56908322991 is a deficient number, since it is larger than the sum of its proper divisors (32102133297).

56908322991 is a wasteful number, since it uses less digits than its factorization.

56908322991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37415103 (or 37415087 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 56908322991 in words is "fifty-six billion, nine hundred eight million, three hundred twenty-two thousand, nine hundred ninety-one".