55645518864 has 80 divisors (see below), whose sum is σ = 154892211264. Its totient is φ = 17112460800.

The previous prime is 55645518853. The next prime is 55645518869. The reversal of 55645518864 is 46881554655.

55645518864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55645518869) 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, 1181854 + ... + 1228034.

Almost surely, 2^55645518864 is an apocalyptic number.

It is an amenable number.

55645518864 is an abundant number, since it is smaller than the sum of its proper divisors (99246692400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55645518864 is a wasteful number, since it uses less digits than its factorization.

55645518864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48136 (or 48130 counting only the distinct ones).

The product of its digits is 23040000, while the sum is 57.

The spelling of 55645518864 in words is "fifty-five billion, six hundred forty-five million, five hundred eighteen thousand, eight hundred sixty-four".