15720555500 has 48 divisors (see below), whose sum is σ = 36974761824. Its totient is φ = 5804510400.

The previous prime is 15720555497. The next prime is 15720555511. The reversal of 15720555500 is 555502751.

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, 1202774 + ... + 1215773.

It is an arithmetic number, because the mean of its divisors is an integer number (770307538).

Almost surely, 2^15720555500 is an apocalyptic number.

15720555500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15720555500 is an abundant number, since it is smaller than the sum of its proper divisors (21254206324).

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

15720555500 is a wasteful number, since it uses less digits than its factorization.

15720555500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418579 (or 2418567 counting only the distinct ones).

The product of its (nonzero) digits is 43750, while the sum is 35.

The spelling of 15720555500 in words is "fifteen billion, seven hundred twenty million, five hundred fifty-five thousand, five hundred".