15857157144 has 64 divisors (see below), whose sum is σ = 39913251840. Its totient is φ = 5249784960.

The previous prime is 15857157137. The next prime is 15857157227. The reversal of 15857157144 is 44175175851.

It is a junction number, because it is equal to n+sod(n) for n = 15857157093 and 15857157102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2464059 + ... + 2470485.

It is an arithmetic number, because the mean of its divisors is an integer number (623644560).

Almost surely, 2^15857157144 is an apocalyptic number.

It is an amenable number.

15857157144 is an abundant number, since it is smaller than the sum of its proper divisors (24056094696).

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

15857157144 is a wasteful number, since it uses less digits than its factorization.

15857157144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120 (or 7116 counting only the distinct ones).

The product of its digits is 784000, while the sum is 48.

The spelling of 15857157144 in words is "fifteen billion, eight hundred fifty-seven million, one hundred fifty-seven thousand, one hundred forty-four".