55616508 has 18 divisors (see below), whose sum is σ = 140586264. Its totient is φ = 18538824.

The previous prime is 55616479. The next prime is 55616549. The reversal of 55616508 is 80561655.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×55616508² = 6186391924228128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1544903 = 55616508 / (5 + 5 + 6 + 1 + 6 + 5 + 0 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 772416 + ... + 772487.

It is an arithmetic number, because the mean of its divisors is an integer number (7810348).

Almost surely, 2^55616508 is an apocalyptic number.

It is an amenable number.

55616508 is an abundant number, since it is smaller than the sum of its proper divisors (84969756).

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

55616508 is a wasteful number, since it uses less digits than its factorization.

55616508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544913 (or 1544908 counting only the distinct ones).

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

The square root of 55616508 is about 7457.6476183848. The cubic root of 55616508 is about 381.7109094440.

The spelling of 55616508 in words is "fifty-five million, six hundred sixteen thousand, five hundred eight".