55655880 has 128 divisors (see below), whose sum is σ = 194227200. Its totient is φ = 12494592.

The previous prime is 55655867. The next prime is 55655891. The reversal of 55655880 is 8855655.

55655880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48999 + ... + 50121.

It is an arithmetic number, because the mean of its divisors is an integer number (1517400).

Almost surely, 2^55655880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55655880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97113600).

55655880 is an abundant number, since it is smaller than the sum of its proper divisors (138571320).

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

55655880 is a wasteful number, since it uses less digits than its factorization.

55655880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1199 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 42.

The square root of 55655880 is about 7460.2868577555. The cubic root of 55655880 is about 381.8009617053.

The spelling of 55655880 in words is "fifty-five million, six hundred fifty-five thousand, eight hundred eighty".