15857242128 has 160 divisors (see below), whose sum is σ = 56020025600. Its totient is φ = 4182119424.

The previous prime is 15857242127. The next prime is 15857242189. The reversal of 15857242128 is 82124275851.

15857242128 is a `hidden beast` number, since 1 + 58 + 572 + 4 + 2 + 1 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (15857242127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162373 + ... + 240996.

It is an arithmetic number, because the mean of its divisors is an integer number (350125160).

Almost surely, 2^15857242128 is an apocalyptic number.

15857242128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15857242128 is an abundant number, since it is smaller than the sum of its proper divisors (40162783472).

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

15857242128 is a wasteful number, since it uses less digits than its factorization.

15857242128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403406 (or 403394 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The spelling of 15857242128 in words is "fifteen billion, eight hundred fifty-seven million, two hundred forty-two thousand, one hundred twenty-eight".