56821660576 has 24 divisors (see below), whose sum is σ = 113400082404. Its totient is φ = 28021639680.

The previous prime is 56821660549. The next prime is 56821660589. The reversal of 56821660576 is 67506612865.

It can be written as a sum of positive squares in 2 ways, for example, as 56417650576 + 404010000 = 237524^2 + 20100^2 .

It is a super-2 number, since 2×56821660576² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12159835 + ... + 12164506.

Almost surely, 2^56821660576 is an apocalyptic number.

It is an amenable number.

56821660576 is a deficient number, since it is larger than the sum of its proper divisors (56578421828).

56821660576 is a wasteful number, since it uses less digits than its factorization.

56821660576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24324424 (or 24324416 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 56821660576 in words is "fifty-six billion, eight hundred twenty-one million, six hundred sixty thousand, five hundred seventy-six".