55815207984 has 30 divisors (see below), whose sum is σ = 156205061636. Its totient is φ = 18605069280.

The previous prime is 55815207977. The next prime is 55815208021. The reversal of 55815207984 is 48970251855.

55815207984 is a `hidden beast` number, since 5 + 581 + 52 + 0 + 7 + 9 + 8 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 55815207984.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 193802662 + ... + 193802949.

Almost surely, 2^55815207984 is an apocalyptic number.

It is an amenable number.

55815207984 is an abundant number, since it is smaller than the sum of its proper divisors (100389853652).

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

55815207984 is a wasteful number, since it uses less digits than its factorization.

55815207984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387605625 (or 387605616 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 54.

The spelling of 55815207984 in words is "fifty-five billion, eight hundred fifteen million, two hundred seven thousand, nine hundred eighty-four".