15957408944 has 20 divisors (see below), whose sum is σ = 31090208760. Its totient is φ = 7934129280.

The previous prime is 15957408931. The next prime is 15957408979. The reversal of 15957408944 is 44980475951.

It is a self number, because there is not a number n which added to its sum of digits gives 15957408944.

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, 2782997 + ... + 2788724.

It is an arithmetic number, because the mean of its divisors is an integer number (1554510438).

Almost surely, 2^15957408944 is an apocalyptic number.

It is an amenable number.

15957408944 is a deficient number, since it is larger than the sum of its proper divisors (15132799816).

15957408944 is a wasteful number, since it uses less digits than its factorization.

15957408944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571908 (or 5571902 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 15957408944 in words is "fifteen billion, nine hundred fifty-seven million, four hundred eight thousand, nine hundred forty-four".