55616904 has 96 divisors (see below), whose sum is σ = 173459520. Its totient is φ = 15769728.

The previous prime is 55616893. The next prime is 55616909. The reversal of 55616904 is 40961655.

55616904 is a `hidden beast` number, since 5 + 561 + 6 + 90 + 4 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (55616909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81814 + ... + 82490.

It is an arithmetic number, because the mean of its divisors is an integer number (1806870).

Almost surely, 2^55616904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55616904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86729760).

55616904 is an abundant number, since it is smaller than the sum of its proper divisors (117842616).

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

55616904 is a wasteful number, since it uses less digits than its factorization.

With its successor (55616905) it forms an eRAP, since the sums of their prime factors are consecutive (859 and 860).

55616904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55616904 is about 7457.6741682645. The cubic root of 55616904 is about 381.7118153930.

The spelling of 55616904 in words is "fifty-five million, six hundred sixteen thousand, nine hundred four".