56658756961 has 3 divisors (see below), whose sum is σ = 56658994993. Its totient is φ = 56658518930.

The previous prime is 56658756943. The next prime is 56658756997. The reversal of 56658756961 is 16965785665.

The square root of 56658756961 is 238031.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 56658756961 - 2⁵ = 56658756929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56658756893 and 56658756902.

It is not an unprimeable number, because it can be changed into a prime (56658756911) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 119016 + ... + 357046.

Almost surely, 2^56658756961 is an apocalyptic number.

56658756961 is the 238031-st square number.

56658756961 is the 119016-th centered octagonal number.

It is an amenable number.

56658756961 is a deficient number, since it is larger than the sum of its proper divisors (238032).

56658756961 is an frugal number, since it uses more digits than its factorization.

56658756961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476062 (or 238031 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 64.

Multiplying 56658756961 by its sum of digits (64), we get a square (3626160445504 = 1904248²).

The spelling of 56658756961 in words is "fifty-six billion, six hundred fifty-eight million, seven hundred fifty-six thousand, nine hundred sixty-one".