15857287285872 has 20 divisors (see below), whose sum is σ = 40964658821960. Its totient is φ = 5285762428608.

The previous prime is 15857287285859. The next prime is 15857287285891. The reversal of 15857287285872 is 27858278275851.

It is a junction number, because it is equal to n+sod(n) for n = 15857287285794 and 15857287285803.

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, 165180075847 + ... + 165180075942.

It is an arithmetic number, because the mean of its divisors is an integer number (2048232941098).

Almost surely, 2^{15857287285872} is an apocalyptic number.

15857287285872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15857287285872 is an abundant number, since it is smaller than the sum of its proper divisors (25107371536088).

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

15857287285872 is a wasteful number, since it uses less digits than its factorization.

15857287285872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330360151800 (or 330360151794 counting only the distinct ones).

The product of its digits is 1404928000, while the sum is 75.

The spelling of 15857287285872 in words is "fifteen trillion, eight hundred fifty-seven billion, two hundred eighty-seven million, two hundred eighty-five thousand, eight hundred seventy-two".