15857730872 has 16 divisors (see below), whose sum is σ = 29734600560. Its totient is φ = 7928504064.

The previous prime is 15857730869. The next prime is 15857730887. The reversal of 15857730872 is 27803775851.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273893 + ... + 326699.

It is an arithmetic number, because the mean of its divisors is an integer number (1858412535).

Almost surely, 2^15857730872 is an apocalyptic number.

It is an amenable number.

15857730872 is a deficient number, since it is larger than the sum of its proper divisors (13876869688).

15857730872 is a wasteful number, since it uses less digits than its factorization.

15857730872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90350 (or 90346 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 53.

The spelling of 15857730872 in words is "fifteen billion, eight hundred fifty-seven million, seven hundred thirty thousand, eight hundred seventy-two".