55183680 has 140 divisors (see below), whose sum is σ = 196390260. Its totient is φ = 14708736.

The previous prime is 55183669. The next prime is 55183691. The reversal of 55183680 is 8638155.

It is an interprime number because it is at equal distance from previous prime (55183669) and next prime (55183691).

It can be written as a sum of positive squares in 2 ways, for example, as 16842816 + 38340864 = 4104^2 + 6192^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24856 + ... + 26984.

Almost surely, 2^55183680 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 55183680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98195130).

55183680 is an abundant number, since it is smaller than the sum of its proper divisors (141206580).

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

55183680 is a wasteful number, since it uses less digits than its factorization.

55183680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 55183680 is about 7428.5718681319. The cubic root of 55183680 is about 380.7181249486.

The spelling of 55183680 in words is "fifty-five million, one hundred eighty-three thousand, six hundred eighty".