56558255665 has 4 divisors (see below), whose sum is σ = 67869906804. Its totient is φ = 45246604528.

The previous prime is 56558255657. The next prime is 56558255687. The reversal of 56558255665 is 56655285565.

It is a happy number.

56558255665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23320954944 + 33237300721 = 152712^2 + 182311^2 .

It is a cyclic number.

It is not a de Polignac number, because 56558255665 - 2³ = 56558255657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5655825562 + ... + 5655825571.

It is an arithmetic number, because the mean of its divisors is an integer number (16967476701).

Almost surely, 2^56558255665 is an apocalyptic number.

It is an amenable number.

56558255665 is a deficient number, since it is larger than the sum of its proper divisors (11311651139).

56558255665 is a wasteful number, since it uses less digits than its factorization.

56558255665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11311651138.

The product of its digits is 54000000, while the sum is 58.

The spelling of 56558255665 in words is "fifty-six billion, five hundred fifty-eight million, two hundred fifty-five thousand, six hundred sixty-five".