55545624 has 48 divisors (see below), whose sum is σ = 152914320. Its totient is φ = 18210240.

The previous prime is 55545619. The next prime is 55545631. The reversal of 55545624 is 42654555.

55545624 is a `hidden beast` number, since 55 + 545 + 62 + 4 = 666.

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 11 ways as a sum of consecutive naturals, for example, 1932 + ... + 10715.

It is an arithmetic number, because the mean of its divisors is an integer number (3185715).

Almost surely, 2^55545624 is an apocalyptic number.

It is an amenable number.

55545624 is an abundant number, since it is smaller than the sum of its proper divisors (97368696).

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

55545624 is a wasteful number, since it uses less digits than its factorization.

55545624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12720 (or 12713 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 55545624 is about 7452.8936662212. The cubic root of 55545624 is about 381.5486752432.

It can be divided in two parts, 55545 and 624, that added together give a square (56169 = 237²).

The spelling of 55545624 in words is "fifty-five million, five hundred forty-five thousand, six hundred twenty-four".