55981164 has 48 divisors (see below), whose sum is σ = 137102336. Its totient is φ = 17755200.

The previous prime is 55981109. The next prime is 55981193. The reversal of 55981164 is 46118955.

55981164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21459 + ... + 23925.

Almost surely, 2^55981164 is an apocalyptic number.

It is an amenable number.

55981164 is an abundant number, since it is smaller than the sum of its proper divisors (81121172).

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

55981164 is a wasteful number, since it uses less digits than its factorization.

55981164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566 (or 2564 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 55981164 is about 7482.0561345128. The cubic root of 55981164 is about 382.5433365397.

The spelling of 55981164 in words is "fifty-five million, nine hundred eighty-one thousand, one hundred sixty-four".