56558647665 has 48 divisors (see below), whose sum is σ = 105779353680. Its totient is φ = 27790663680.

The previous prime is 56558647661. The next prime is 56558647667. The reversal of 56558647665 is 56674685565.

56558647665 is a `hidden beast` number, since 5 + 6 + 5 + 586 + 47 + 6 + 6 + 5 = 666.

56558647665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 12916095201 + 43642552464 = 113649^2 + 208908^2 .

It is not a de Polignac number, because 56558647665 - 2² = 56558647661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56558647661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 212001 + ... + 397569.

It is an arithmetic number, because the mean of its divisors is an integer number (2203736535).

Almost surely, 2^56558647665 is an apocalyptic number.

It is an amenable number.

56558647665 is a deficient number, since it is larger than the sum of its proper divisors (49220706015).

56558647665 is a wasteful number, since it uses less digits than its factorization.

56558647665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186114 (or 186111 counting only the distinct ones).

The product of its digits is 181440000, while the sum is 63.

The spelling of 56558647665 in words is "fifty-six billion, five hundred fifty-eight million, six hundred forty-seven thousand, six hundred sixty-five".