1591315916 has 12 divisors (see below), whose sum is σ = 2803246320. Its totient is φ = 790388400.

The previous prime is 1591315909. The next prime is 1591315933. The reversal of 1591315916 is 6195131951.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 1316711 + ... + 1317918.

It is an arithmetic number, because the mean of its divisors is an integer number (233603860).

Almost surely, 2^1591315916 is an apocalyptic number.

It is an amenable number.

1591315916 is a deficient number, since it is larger than the sum of its proper divisors (1211930404).

1591315916 is a wasteful number, since it uses less digits than its factorization.

1591315916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634784 (or 2634782 counting only the distinct ones).

The product of its digits is 36450, while the sum is 41.

The square root of 1591315916 is about 39891.3012572917. The cubic root of 1591315916 is about 1167.4872207653.

The spelling of 1591315916 in words is "one billion, five hundred ninety-one million, three hundred fifteen thousand, nine hundred sixteen".