56721706522353 has 12 divisors (see below), whose sum is σ = 84574300764928. Its totient is φ = 36594649369080.

The previous prime is 56721706522333. The next prime is 56721706522361. The reversal of 56721706522353 is 35322560712765.

56721706522353 is a `hidden beast` number, since 5 + 6 + 72 + 17 + 0 + 6 + 522 + 35 + 3 = 666.

It is not a de Polignac number, because 56721706522353 - 2¹⁴ = 56721706505969 is a prime.

It is a super-2 number, since 2×56721706522353² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56721706522353.

It is not an unprimeable number, because it can be changed into a prime (56721706522333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101651803525 + ... + 101651804082.

Almost surely, 2^{56721706522353} is an apocalyptic number.

It is an amenable number.

56721706522353 is a deficient number, since it is larger than the sum of its proper divisors (27852594242575).

56721706522353 is a wasteful number, since it uses less digits than its factorization.

56721706522353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203303607644 (or 203303607641 counting only the distinct ones).

The product of its (nonzero) digits is 15876000, while the sum is 54.

The spelling of 56721706522353 in words is "fifty-six trillion, seven hundred twenty-one billion, seven hundred six million, five hundred twenty-two thousand, three hundred fifty-three".