55258868728 has 64 divisors (see below), whose sum is σ = 128942208000. Its totient is φ = 21662266752.

The previous prime is 55258868719. The next prime is 55258868741. The reversal of 55258868728 is 82786885255.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55258868728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864576 + ... + 926287.

It is an arithmetic number, because the mean of its divisors is an integer number (2014722000).

Almost surely, 2^55258868728 is an apocalyptic number.

55258868728 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

55258868728 is an abundant number, since it is smaller than the sum of its proper divisors (73683339272).

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

55258868728 is a wasteful number, since it uses less digits than its factorization.

55258868728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790924 (or 1790920 counting only the distinct ones).

The product of its digits is 86016000, while the sum is 64.

The spelling of 55258868728 in words is "fifty-five billion, two hundred fifty-eight million, eight hundred sixty-eight thousand, seven hundred twenty-eight".