56570520681 has 12 divisors (see below), whose sum is σ = 81759770352. Its totient is φ = 37692082296.

The previous prime is 56570520649. The next prime is 56570520683. The reversal of 56570520681 is 18602507565.

56570520681 is a `hidden beast` number, since 5 + 65 + 7 + 0 + 520 + 68 + 1 = 666.

It is not a de Polignac number, because 56570520681 - 2⁵ = 56570520649 is a prime.

It is a super-2 number, since 2×56570520681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56570520683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1783251 + ... + 1814696.

It is an arithmetic number, because the mean of its divisors is an integer number (6813314196).

Almost surely, 2^56570520681 is an apocalyptic number.

It is an amenable number.

56570520681 is a deficient number, since it is larger than the sum of its proper divisors (25189249671).

56570520681 is a wasteful number, since it uses less digits than its factorization.

56570520681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599700 (or 3599697 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 56570520681 in words is "fifty-six billion, five hundred seventy million, five hundred twenty thousand, six hundred eighty-one".