15957840144 has 40 divisors (see below), whose sum is σ = 41267796192. Its totient is φ = 5313683200.

The previous prime is 15957840139. The next prime is 15957840163. The reversal of 15957840144 is 44104875951.

It is a super-2 number, since 2×15957840144² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 15957840093 and 15957840102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128682 + ... + 220169.

Almost surely, 2^15957840144 is an apocalyptic number.

It is an amenable number.

15957840144 is an abundant number, since it is smaller than the sum of its proper divisors (25309956048).

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

15957840144 is a wasteful number, since it uses less digits than its factorization.

15957840144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349815 (or 349809 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 15957840144 in words is "fifteen billion, nine hundred fifty-seven million, eight hundred forty thousand, one hundred forty-four".