55339819920 has 480 divisors, whose sum is σ = 241898624640. Its totient is φ = 11498941440.

The previous prime is 55339819901. The next prime is 55339819949. The reversal of 55339819920 is 2991893355.

55339819920 is a `hidden beast` number, since 5 + 533 + 9 + 8 + 19 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1140474 + ... + 1188006.

It is an arithmetic number, because the mean of its divisors is an integer number (503955468).

Almost surely, 2^55339819920 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 55339819920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120949312320).

55339819920 is an abundant number, since it is smaller than the sum of its proper divisors (186558804720).

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

55339819920 is a wasteful number, since it uses less digits than its factorization.

55339819920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47580 (or 47561 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 55339819920 in words is "fifty-five billion, three hundred thirty-nine million, eight hundred nineteen thousand, nine hundred twenty".