55981838976 has 128 divisors (see below), whose sum is σ = 173897433600. Its totient is φ = 15622806528.

The previous prime is 55981838959. The next prime is 55981838981. The reversal of 55981838976 is 67983818955.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 55981838976.

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, 126586 + ... + 357753.

It is an arithmetic number, because the mean of its divisors is an integer number (1358573700).

Almost surely, 2^55981838976 is an apocalyptic number.

55981838976 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55981838976 is an abundant number, since it is smaller than the sum of its proper divisors (117915594624).

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

55981838976 is a wasteful number, since it uses less digits than its factorization.

55981838976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484406 (or 484394 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 69.

The spelling of 55981838976 in words is "fifty-five billion, nine hundred eighty-one million, eight hundred thirty-eight thousand, nine hundred seventy-six".