55558986 has 32 divisors (see below), whose sum is σ = 128738688. Its totient is φ = 15655680.

The previous prime is 55558973. The next prime is 55559017. The reversal of 55558986 is 68985555.

It is a Curzon 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, 5995 + ... + 12126.

It is an arithmetic number, because the mean of its divisors is an integer number (4023084).

Almost surely, 2^55558986 is an apocalyptic number.

55558986 is an abundant number, since it is smaller than the sum of its proper divisors (73179702).

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

55558986 is a wasteful number, since it uses less digits than its factorization.

55558986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18206.

The product of its digits is 2160000, while the sum is 51.

The square root of 55558986 is about 7453.7900426562. The cubic root of 55558986 is about 381.5792677800.

It can be divided in two parts, 5555 and 8986, that added together give a palindrome (14541).

The spelling of 55558986 in words is "fifty-five million, five hundred fifty-eight thousand, nine hundred eighty-six".