55915473864 has 64 divisors (see below), whose sum is σ = 143871033600. Its totient is φ = 18101792576.

The previous prime is 55915473829. The next prime is 55915473877. The reversal of 55915473864 is 46837451955.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120354 + ... + 355409.

It is an arithmetic number, because the mean of its divisors is an integer number (2247984900).

Almost surely, 2^55915473864 is an apocalyptic number.

It is an amenable number.

55915473864 is an abundant number, since it is smaller than the sum of its proper divisors (87955559736).

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

55915473864 is a wasteful number, since it uses less digits than its factorization.

55915473864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475914 (or 475910 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 57.

The spelling of 55915473864 in words is "fifty-five billion, nine hundred fifteen million, four hundred seventy-three thousand, eight hundred sixty-four".