55604556 has 60 divisors (see below), whose sum is σ = 166133968. Its totient is φ = 15886368.

The previous prime is 55604543. The next prime is 55604557. The reversal of 55604556 is 65540655.

It is a happy number.

55604556 is a `hidden beast` number, since 5 + 560 + 45 + 56 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55604556.

It is not an unprimeable number, because it can be changed into a prime (55604557) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9991 + ... + 14526.

Almost surely, 2^55604556 is an apocalyptic number.

It is an amenable number.

55604556 is an abundant number, since it is smaller than the sum of its proper divisors (110529412).

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

55604556 is a wasteful number, since it uses less digits than its factorization.

55604556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24540 (or 24529 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 55604556 is about 7456.8462502589. The cubic root of 55604556 is about 381.6835642318.

The spelling of 55604556 in words is "fifty-five million, six hundred four thousand, five hundred fifty-six".