55545800 has 108 divisors (see below), whose sum is σ = 141755715. Its totient is φ = 20236800.

The previous prime is 55545781. The next prime is 55545811. The reversal of 55545800 is 854555.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 36168196 + 19377604 = 6014^2 + 4402^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5270.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1791785 + ... + 1791815.

Almost surely, 2^55545800 is an apocalyptic number.

55545800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55545800

55545800 is an abundant number, since it is smaller than the sum of its proper divisors (86209915).

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

55545800 is a wasteful number, since it uses less digits than its factorization.

55545800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 55545800 is about 7452.9054737062. The cubic root of 55545800 is about 381.5490782302.

Multiplying 55545800 by its sum of digits (32), we get a square (1777465600 = 42160²).

Multiplying 55545800 by its product of nonzero digits (20000), we get a square (1110916000000 = 1054000²).

The spelling of 55545800 in words is "fifty-five million, five hundred forty-five thousand, eight hundred".