56446664465 has 32 divisors (see below), whose sum is σ = 70222412160. Its totient is φ = 43535771136.

The previous prime is 56446664447. The next prime is 56446664489.

56446664465 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56446664465 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56446664465.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3837014 + ... + 3851696.

It is an arithmetic number, because the mean of its divisors is an integer number (2194450380).

Almost surely, 2^56446664465 is an apocalyptic number.

It is an amenable number.

56446664465 is a deficient number, since it is larger than the sum of its proper divisors (13775747695).

56446664465 is a wasteful number, since it uses less digits than its factorization.

56446664465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14993.

The product of its digits is 49766400, while the sum is 56.

The spelling of 56446664465 in words is "fifty-six billion, four hundred forty-six million, six hundred sixty-four thousand, four hundred sixty-five".