15957840145 has 32 divisors (see below), whose sum is σ = 20805507072. Its totient is φ = 11679923712.

The previous prime is 15957840139. The next prime is 15957840163. The reversal of 15957840145 is 54104875951.

It is a cyclic number.

It is not a de Polignac number, because 15957840145 - 2²³ = 15949451537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8752704 + ... + 8754526.

It is an arithmetic number, because the mean of its divisors is an integer number (650172096).

Almost surely, 2^15957840145 is an apocalyptic number.

It is an amenable number.

15957840145 is a deficient number, since it is larger than the sum of its proper divisors (4847666927).

15957840145 is a wasteful number, since it uses less digits than its factorization.

15957840145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961.

The product of its (nonzero) digits is 1008000, while the sum is 49.

The spelling of 15957840145 in words is "fifteen billion, nine hundred fifty-seven million, eight hundred forty thousand, one hundred forty-five".