55558900 has 18 divisors (see below), whose sum is σ = 120563030. Its totient is φ = 22223520.

The previous prime is 55558891. The next prime is 55558901. The reversal of 55558900 is 985555.

It can be written as a sum of positive squares in 3 ways, for example, as 5262436 + 50296464 = 2294^2 + 7092^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55558900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55558901) 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, 277695 + ... + 277894.

Almost surely, 2^55558900 is an apocalyptic number.

55558900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55558900 is an abundant number, since it is smaller than the sum of its proper divisors (65004130).

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

55558900 is a wasteful number, since it uses less digits than its factorization.

55558900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555603 (or 555596 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 37.

The square root of 55558900 is about 7453.7842737766. The cubic root of 55558900 is about 381.5790708972.

The spelling of 55558900 in words is "fifty-five million, five hundred fifty-eight thousand, nine hundred".