55189680 has 360 divisors, whose sum is σ = 226204272. Its totient is φ = 11031552.

The previous prime is 55189669. The next prime is 55189691. The reversal of 55189680 is 8698155.

It is an interprime number because it is at equal distance from previous prime (55189669) and next prime (55189691).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2904711 + ... + 2904729.

Almost surely, 2^55189680 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 55189680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113102136).

55189680 is an abundant number, since it is smaller than the sum of its proper divisors (171014592).

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

55189680 is a wasteful number, since it uses less digits than its factorization.

55189680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 55189680 is about 7428.9757032851. The cubic root of 55189680 is about 380.7319226630.

The spelling of 55189680 in words is "fifty-five million, one hundred eighty-nine thousand, six hundred eighty".