56555665123001 has 16 divisors (see below), whose sum is σ = 64148557746240. Its totient is φ = 49389349625280.

The previous prime is 56555665122991. The next prime is 56555665123043. The reversal of 56555665123001 is 10032156655565.

It is a cyclic number.

It is not a de Polignac number, because 56555665123001 - 2²⁶ = 56555598014137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56555665123051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449913011 + ... + 450038696.

It is an arithmetic number, because the mean of its divisors is an integer number (4009284859140).

Almost surely, 2^{56555665123001} is an apocalyptic number.

It is an amenable number.

56555665123001 is a deficient number, since it is larger than the sum of its proper divisors (7592892623239).

56555665123001 is a wasteful number, since it uses less digits than its factorization.

56555665123001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899951944.

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 56555665123001 in words is "fifty-six trillion, five hundred fifty-five billion, six hundred sixty-five million, one hundred twenty-three thousand, one".