56555665172201 has 32 divisors (see below), whose sum is σ = 63115831981440. Its totient is φ = 50345084275200.

The previous prime is 56555665172197. The next prime is 56555665172231. The reversal of 56555665172201 is 10227156655565.

It is not a de Polignac number, because 56555665172201 - 2² = 56555665172197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56555665172231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304017146 + ... + 304203116.

It is an arithmetic number, because the mean of its divisors is an integer number (1972369749420).

Almost surely, 2^{56555665172201} is an apocalyptic number.

It is an amenable number.

56555665172201 is a deficient number, since it is larger than the sum of its proper divisors (6560166809239).

56555665172201 is a wasteful number, since it uses less digits than its factorization.

56555665172201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193577.

The product of its (nonzero) digits is 18900000, while the sum is 56.

The spelling of 56555665172201 in words is "fifty-six trillion, five hundred fifty-five billion, six hundred sixty-five million, one hundred seventy-two thousand, two hundred one".