56776766216256 has 84 divisors (see below), whose sum is σ = 162755450726700. Its totient is φ = 18923832511488.

The previous prime is 56776766216207. The next prime is 56776766216257. The reversal of 56776766216256 is 65261266767765.

56776766216256 is a `hidden beast` number, since 567 + 7 + 6 + 7 + 6 + 6 + 2 + 1 + 6 + 2 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41568450969600 + 15208315246656 = 6447360^2 + 3899784^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (56776766216257) 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, 1646350 + ... + 10782578.

Almost surely, 2^{56776766216256} is an apocalyptic number.

It is an amenable number.

56776766216256 is an abundant number, since it is smaller than the sum of its proper divisors (105978684510444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56776766216256 is a wasteful number, since it uses less digits than its factorization.

56776766216256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9147036 (or 9147023 counting only the distinct ones).

The product of its digits is 1600300800, while the sum is 72.

The spelling of 56776766216256 in words is "fifty-six trillion, seven hundred seventy-six billion, seven hundred sixty-six million, two hundred sixteen thousand, two hundred fifty-six".