15913519872 has 72 divisors (see below), whose sum is σ = 42598341744. Its totient is φ = 5273800704.

The previous prime is 15913519849. The next prime is 15913519883. The reversal of 15913519872 is 27891531951.

It is a super-2 number, since 2×15913519872² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72978 + ... + 192750.

Almost surely, 2^15913519872 is an apocalyptic number.

15913519872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15913519872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21299170872).

15913519872 is an abundant number, since it is smaller than the sum of its proper divisors (26684821872).

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

15913519872 is a wasteful number, since it uses less digits than its factorization.

15913519872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119965 (or 119951 counting only the distinct ones).

The product of its digits is 680400, while the sum is 51.

The spelling of 15913519872 in words is "fifteen billion, nine hundred thirteen million, five hundred nineteen thousand, eight hundred seventy-two".