57631328561 has 16 divisors (see below), whose sum is σ = 62613638400. Its totient is φ = 52871555088.

The previous prime is 57631328549. The next prime is 57631328593. The reversal of 57631328561 is 16582313675.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57631328561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57631378561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308555 + ... + 458768.

It is an arithmetic number, because the mean of its divisors is an integer number (3913352400).

Almost surely, 2^57631328561 is an apocalyptic number.

It is an amenable number.

57631328561 is a deficient number, since it is larger than the sum of its proper divisors (4982309839).

57631328561 is a wasteful number, since it uses less digits than its factorization.

57631328561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767468.

The product of its digits is 907200, while the sum is 47.

The spelling of 57631328561 in words is "fifty-seven billion, six hundred thirty-one million, three hundred twenty-eight thousand, five hundred sixty-one".