15945399532 has 12 divisors (see below), whose sum is σ = 28297470096. Its totient is φ = 7860408080.

The previous prime is 15945399467. The next prime is 15945399541. The reversal of 15945399532 is 23599354951.

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, 28072603 + ... + 28073170.

It is an arithmetic number, because the mean of its divisors is an integer number (2358122508).

Almost surely, 2^15945399532 is an apocalyptic number.

It is an amenable number.

15945399532 is a deficient number, since it is larger than the sum of its proper divisors (12352070564).

15945399532 is a wasteful number, since it uses less digits than its factorization.

15945399532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56145848 (or 56145846 counting only the distinct ones).

The product of its digits is 6561000, while the sum is 55.

The spelling of 15945399532 in words is "fifteen billion, nine hundred forty-five million, three hundred ninety-nine thousand, five hundred thirty-two".