56661600051 has 24 divisors (see below), whose sum is σ = 93555028320. Its totient is φ = 32371681536.

The previous prime is 56661600043. The next prime is 56661600053. The reversal of 56661600051 is 15000616665.

It is not a de Polignac number, because 56661600051 - 2³ = 56661600043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56661599979 and 56661600015.

It is not an unprimeable number, because it can be changed into a prime (56661600053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243745 + ... + 415613.

It is an arithmetic number, because the mean of its divisors is an integer number (3898126180).

Almost surely, 2^56661600051 is an apocalyptic number.

56661600051 is a deficient number, since it is larger than the sum of its proper divisors (36893428269).

56661600051 is a wasteful number, since it uses less digits than its factorization.

56661600051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177115 (or 177112 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 56661600051 in words is "fifty-six billion, six hundred sixty-one million, six hundred thousand, fifty-one".