56976763581 has 8 divisors (see below), whose sum is σ = 84410020160. Its totient is φ = 37984509036.

The previous prime is 56976763577. The next prime is 56976763607. The reversal of 56976763581 is 18536767965.

56976763581 is a `hidden beast` number, since 569 + 7 + 6 + 7 + 63 + 5 + 8 + 1 = 666.

It is not a de Polignac number, because 56976763581 - 2² = 56976763577 is a prime.

It is a super-2 number, since 2×56976763581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56976763511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055125225 + ... + 1055125278.

It is an arithmetic number, because the mean of its divisors is an integer number (10551252520).

Almost surely, 2^56976763581 is an apocalyptic number.

It is an amenable number.

56976763581 is a deficient number, since it is larger than the sum of its proper divisors (27433256579).

56976763581 is a wasteful number, since it uses less digits than its factorization.

56976763581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110250512 (or 2110250506 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 56976763581 in words is "fifty-six billion, nine hundred seventy-six million, seven hundred sixty-three thousand, five hundred eighty-one".