55239856800 has 144 divisors (see below), whose sum is σ = 180175780512. Its totient is φ = 14700313600.

The previous prime is 55239856757. The next prime is 55239856823. The reversal of 55239856800 is 865893255.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1154962 + ... + 1201838.

It is an arithmetic number, because the mean of its divisors is an integer number (1251220698).

Almost surely, 2^55239856800 is an apocalyptic number.

55239856800 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 55239856800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90087890256).

55239856800 is an abundant number, since it is smaller than the sum of its proper divisors (124935923712).

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

55239856800 is a wasteful number, since it uses less digits than its factorization.

55239856800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47391 (or 47378 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 51.

The spelling of 55239856800 in words is "fifty-five billion, two hundred thirty-nine million, eight hundred fifty-six thousand, eight hundred".