55550556 has 24 divisors (see below), whose sum is σ = 144020240. Its totient is φ = 18516816.

The previous prime is 55550527. The next prime is 55550557. The reversal of 55550556 is 65505555.

55550556 is a `hidden beast` number, since 5 + 55 + 50 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55550556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257071 + ... + 257286.

Almost surely, 2^55550556 is an apocalyptic number.

It is an amenable number.

55550556 is an abundant number, since it is smaller than the sum of its proper divisors (88469684).

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

55550556 is a wasteful number, since it uses less digits than its factorization.

55550556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514370 (or 514362 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 36.

The square root of 55550556 is about 7453.2245370712. The cubic root of 55550556 is about 381.5599677162.

The spelling of 55550556 in words is "fifty-five million, five hundred fifty thousand, five hundred fifty-six".