55506816 has 64 divisors (see below), whose sum is σ = 163832400. Its totient is φ = 18501120.

The previous prime is 55506793. The next prime is 55506827. The reversal of 55506816 is 61860555.

It is a tau number, because it is divible by the number of its divisors (64).

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

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, 4575 + ... + 11486.

Almost surely, 2^55506816 is an apocalyptic number.

It is an amenable number.

55506816 is an abundant number, since it is smaller than the sum of its proper divisors (108325584).

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

55506816 is a wasteful number, since it uses less digits than its factorization.

55506816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16084 (or 16066 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 55506816 is about 7450.2896587985. The cubic root of 55506816 is about 381.4597958099.

The spelling of 55506816 in words is "fifty-five million, five hundred six thousand, eight hundred sixteen".