56511779625 has 128 divisors (see below), whose sum is σ = 121849728000. Its totient is φ = 25833427200.

The previous prime is 56511779609. The next prime is 56511779633. The reversal of 56511779625 is 52697711565.

56511779625 is a `hidden beast` number, since 5 + 6 + 5 + 1 + 1 + 7 + 7 + 9 + 625 = 666.

It is not a de Polignac number, because 56511779625 - 2⁴ = 56511779609 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 1133217 + ... + 1182033.

It is an arithmetic number, because the mean of its divisors is an integer number (951951000).

Almost surely, 2^56511779625 is an apocalyptic number.

It is an amenable number.

56511779625 is an abundant number, since it is smaller than the sum of its proper divisors (65337948375).

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

56511779625 is an equidigital number, since it uses as much as digits as its factorization.

56511779625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48862 (or 48832 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 54.

The spelling of 56511779625 in words is "fifty-six billion, five hundred eleven million, seven hundred seventy-nine thousand, six hundred twenty-five".