55633590 has 48 divisors (see below), whose sum is σ = 145244736. Its totient is φ = 14774400.

The previous prime is 55633579. The next prime is 55633621. The reversal of 55633590 is 9533655.

55633590 is a `hidden beast` number, since 5 + 5 + 63 + 3 + 590 = 666.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23250 + ... + 25530.

It is an arithmetic number, because the mean of its divisors is an integer number (3025932).

Almost surely, 2^55633590 is an apocalyptic number.

55633590 is an abundant number, since it is smaller than the sum of its proper divisors (89611146).

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

55633590 is a wasteful number, since it uses less digits than its factorization.

55633590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 36.

The square root of 55633590 is about 7458.7927977656. The cubic root of 55633590 is about 381.7499848825.

The spelling of 55633590 in words is "fifty-five million, six hundred thirty-three thousand, five hundred ninety".