56856143640 has 64 divisors (see below), whose sum is σ = 171106616160. Its totient is φ = 15113799680.

The previous prime is 56856143639. The next prime is 56856143683. The reversal of 56856143640 is 4634165865.

It is a super-2 number, since 2×56856143640² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56856143640.

It is a congruent number.

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, 709281 + ... + 785360.

Almost surely, 2^56856143640 is an apocalyptic number.

It is an amenable number.

56856143640 is an abundant number, since it is smaller than the sum of its proper divisors (114250472520).

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

56856143640 is a wasteful number, since it uses less digits than its factorization.

56856143640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494972 (or 1494968 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 56856143640 in words is "fifty-six billion, eight hundred fifty-six million, one hundred forty-three thousand, six hundred forty".