55116990 has 32 divisors (see below), whose sum is σ = 146979360. Its totient is φ = 14697792.

The previous prime is 55116989. The next prime is 55117001. The reversal of 55116990 is 9961155.

55116990 is a `hidden beast` number, since 551 + 16 + 9 + 90 = 666.

It is a congruent number.

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, 101799 + ... + 102338.

It is an arithmetic number, because the mean of its divisors is an integer number (4593105).

Almost surely, 2^55116990 is an apocalyptic number.

55116990 is an abundant number, since it is smaller than the sum of its proper divisors (91862370).

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

55116990 is a wasteful number, since it uses less digits than its factorization.

55116990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204153 (or 204147 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 55116990 is about 7424.0817614032. The cubic root of 55116990 is about 380.5646959718.

The spelling of 55116990 in words is "fifty-five million, one hundred sixteen thousand, nine hundred ninety".