55721869584 has 40 divisors (see below), whose sum is σ = 148591656192. Its totient is φ = 17974796160.

The previous prime is 55721869583. The next prime is 55721869589. The reversal of 55721869584 is 48596812755.

It is not an unprimeable number, because it can be changed into a prime (55721869583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18722259 + ... + 18725234.

Almost surely, 2^55721869584 is an apocalyptic number.

It is an amenable number.

55721869584 is an abundant number, since it is smaller than the sum of its proper divisors (92869786608).

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

55721869584 is a wasteful number, since it uses less digits than its factorization.

55721869584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37447535 (or 37447529 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 60.

The spelling of 55721869584 in words is "fifty-five billion, seven hundred twenty-one million, eight hundred sixty-nine thousand, five hundred eighty-four".