15857133912 has 32 divisors (see below), whose sum is σ = 44047594800. Its totient is φ = 5285711232.

The previous prime is 15857133907. The next prime is 15857133913. The reversal of 15857133912 is 21933175851.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15857133913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36706113 + ... + 36706544.

Almost surely, 2^15857133912 is an apocalyptic number.

15857133912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15857133912 is an abundant number, since it is smaller than the sum of its proper divisors (28190460888).

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

15857133912 is a wasteful number, since it uses less digits than its factorization.

15857133912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73412672 (or 73412662 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

It can be divided in two parts, 15857 and 133912, that added together give a square (149769 = 387²).

The spelling of 15857133912 in words is "fifteen billion, eight hundred fifty-seven million, one hundred thirty-three thousand, nine hundred twelve".