55635516 has 18 divisors (see below), whose sum is σ = 140634312. Its totient is φ = 18545160.

The previous prime is 55635511. The next prime is 55635521. The reversal of 55635516 is 61553655.

55635516 is a `hidden beast` number, since 5 + 5 + 635 + 5 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (55635511) and next prime (55635521).

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

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: 1545431 = 55635516 / (5 + 5 + 6 + 3 + 5 + 5 + 1 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55635511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 772680 + ... + 772751.

Almost surely, 2^55635516 is an apocalyptic number.

It is an amenable number.

55635516 is an abundant number, since it is smaller than the sum of its proper divisors (84998796).

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

55635516 is a wasteful number, since it uses less digits than its factorization.

55635516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545441 (or 1545436 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 55635516 is about 7458.9219060130. The cubic root of 55635516 is about 381.7543901467.

The spelling of 55635516 in words is "fifty-five million, six hundred thirty-five thousand, five hundred sixteen".