56571390538 has 16 divisors (see below), whose sum is σ = 91997879400. Its totient is φ = 25934636736.

The previous prime is 56571390527. The next prime is 56571390553. The reversal of 56571390538 is 83509317565.

It can be written as a sum of positive squares in 4 ways, for example, as 42769135249 + 13802255289 = 206807^2 + 117483^2 .

It is a super-3 number, since 3×56571390538³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7297545 + ... + 7305292.

Almost surely, 2^56571390538 is an apocalyptic number.

56571390538 is a deficient number, since it is larger than the sum of its proper divisors (35426488862).

56571390538 is a wasteful number, since it uses less digits than its factorization.

56571390538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14603001.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 56571390538 in words is "fifty-six billion, five hundred seventy-one million, three hundred ninety thousand, five hundred thirty-eight".