55258263220 has 96 divisors (see below), whose sum is σ = 122834589696. Its totient is φ = 20851084800.

The previous prime is 55258263161. The next prime is 55258263239. The reversal of 55258263220 is 2236285255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5153665 + ... + 5164375.

It is an arithmetic number, because the mean of its divisors is an integer number (1279526976).

Almost surely, 2^55258263220 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 55258263220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61417294848).

55258263220 is an abundant number, since it is smaller than the sum of its proper divisors (67576326476).

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

55258263220 is a wasteful number, since it uses less digits than its factorization.

55258263220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10961 (or 10959 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 55258263220 in words is "fifty-five billion, two hundred fifty-eight million, two hundred sixty-three thousand, two hundred twenty".