56655523872 has 84 divisors (see below), whose sum is σ = 167234410350. Its totient is φ = 18885166848.

The previous prime is 56655523823. The next prime is 56655523877. The reversal of 56655523872 is 27832555665.

It is a happy number.

56655523872 is a `hidden beast` number, since 5 + 6 + 6 + 5 + 552 + 3 + 87 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55584663696 + 1070860176 = 235764^2 + 32724^2 .

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

It is not an unprimeable number, because it can be changed into a prime (56655523877) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1190997 + ... + 1237652.

Almost surely, 2^56655523872 is an apocalyptic number.

It is an amenable number.

56655523872 is an abundant number, since it is smaller than the sum of its proper divisors (110578886478).

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

56655523872 is an equidigital number, since it uses as much as digits as its factorization.

56655523872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428677 (or 2428654 counting only the distinct ones).

The product of its digits is 15120000, while the sum is 54.

The spelling of 56655523872 in words is "fifty-six billion, six hundred fifty-five million, five hundred twenty-three thousand, eight hundred seventy-two".