56620688256 has 512 divisors, whose sum is σ = 196466688000. Its totient is φ = 15868016640.

The previous prime is 56620688251. The next prime is 56620688263. The reversal of 56620688256 is 65288602665.

56620688256 is a `hidden beast` number, since 5 + 6 + 620 + 6 + 8 + 8 + 2 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56620688251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31058161 + ... + 31059983.

It is an arithmetic number, because the mean of its divisors is an integer number (383724000).

Almost surely, 2^56620688256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56620688256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98233344000).

56620688256 is an abundant number, since it is smaller than the sum of its proper divisors (139845999744).

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

56620688256 is a wasteful number, since it uses less digits than its factorization.

56620688256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 56620688256 in words is "fifty-six billion, six hundred twenty million, six hundred eighty-eight thousand, two hundred fifty-six".