56556770128 has 40 divisors (see below), whose sum is σ = 115365294720. Its totient is φ = 26785578240.

The previous prime is 56556770119. The next prime is 56556770143. The reversal of 56556770128 is 82107765565.

It is a super-2 number, since 2×56556770128² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2454276 + ... + 2477212.

It is an arithmetic number, because the mean of its divisors is an integer number (2884132368).

Almost surely, 2^56556770128 is an apocalyptic number.

It is an amenable number.

56556770128 is an abundant number, since it is smaller than the sum of its proper divisors (58808524592).

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

56556770128 is a wasteful number, since it uses less digits than its factorization.

56556770128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31075 (or 31069 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 56556770128 in words is "fifty-six billion, five hundred fifty-six million, seven hundred seventy thousand, one hundred twenty-eight".