56700564431551 has 16 divisors (see below), whose sum is σ = 61054341472800. Its totient is φ = 52459974908928.

The previous prime is 56700564431477. The next prime is 56700564431569. The reversal of 56700564431551 is 15513446500765.

It is a cyclic number.

It is not a de Polignac number, because 56700564431551 - 2²¹ = 56700562334399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56700564461551) 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, 75139441 + ... + 75890293.

It is an arithmetic number, because the mean of its divisors is an integer number (3815896342050).

Almost surely, 2^{56700564431551} is an apocalyptic number.

56700564431551 is a deficient number, since it is larger than the sum of its proper divisors (4353777041249).

56700564431551 is a wasteful number, since it uses less digits than its factorization.

56700564431551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826218.

The product of its (nonzero) digits is 7560000, while the sum is 52.

The spelling of 56700564431551 in words is "fifty-six trillion, seven hundred billion, five hundred sixty-four million, four hundred thirty-one thousand, five hundred fifty-one".