55359886221420 has 96 divisors (see below), whose sum is σ = 177999251431680. Its totient is φ = 12714232239360.

The previous prime is 55359886221397. The next prime is 55359886221421. The reversal of 55359886221420 is 2412268895355.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (55359886221421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2207319447 + ... + 2207344526.

It is an arithmetic number, because the mean of its divisors is an integer number (1854158869080).

Almost surely, 2^{55359886221420} is an apocalyptic number.

It is an amenable number.

55359886221420 is an abundant number, since it is smaller than the sum of its proper divisors (122639365210260).

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

55359886221420 is a wasteful number, since it uses less digits than its factorization.

55359886221420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414664015 (or 4414664013 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 60.

The spelling of 55359886221420 in words is "fifty-five trillion, three hundred fifty-nine billion, eight hundred eighty-six million, two hundred twenty-one thousand, four hundred twenty".