55686318 has 16 divisors (see below), whose sum is σ = 111490176. Its totient is φ = 18542520.

The previous prime is 55686299. The next prime is 55686329. The reversal of 55686318 is 81368655.

It is a self number, because there is not a number n which added to its sum of digits gives 55686318.

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, 2013 + ... + 10743.

It is an arithmetic number, because the mean of its divisors is an integer number (6968136).

Almost surely, 2^55686318 is an apocalyptic number.

55686318 is an abundant number, since it is smaller than the sum of its proper divisors (55803858).

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

55686318 is a wasteful number, since it uses less digits than its factorization.

55686318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9799.

The product of its digits is 172800, while the sum is 42.

The square root of 55686318 is about 7462.3265808996. The cubic root of 55686318 is about 381.8705508771.

The spelling of 55686318 in words is "fifty-five million, six hundred eighty-six thousand, three hundred eighteen".