55390164 has 24 divisors (see below), whose sum is σ = 134863680. Its totient is φ = 17660544.

The previous prime is 55390157. The next prime is 55390177. The reversal of 55390164 is 46109355.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100069 + ... + 100620.

It is an arithmetic number, because the mean of its divisors is an integer number (5619320).

Almost surely, 2^55390164 is an apocalyptic number.

It is an amenable number.

55390164 is an abundant number, since it is smaller than the sum of its proper divisors (79473516).

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

55390164 is a wasteful number, since it uses less digits than its factorization.

55390164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200719 (or 200717 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 55390164 is about 7442.4568524110. The cubic root of 55390164 is about 381.1923856681.

The spelling of 55390164 in words is "fifty-five million, three hundred ninety thousand, one hundred sixty-four".