1317138664 has 32 divisors (see below), whose sum is σ = 2551910400. Its totient is φ = 636672960.

The previous prime is 1317138659. The next prime is 1317138689. The reversal of 1317138664 is 4668317131.

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, 314617 + ... + 318775.

It is an arithmetic number, because the mean of its divisors is an integer number (79747200).

Almost surely, 2^1317138664 is an apocalyptic number.

It is an amenable number.

1317138664 is a deficient number, since it is larger than the sum of its proper divisors (1234771736).

1317138664 is a wasteful number, since it uses less digits than its factorization.

1317138664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473 (or 5469 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 1317138664 is about 36292.4050456841. The cubic root of 1317138664 is about 1096.1681171594.

The spelling of 1317138664 in words is "one billion, three hundred seventeen million, one hundred thirty-eight thousand, six hundred sixty-four".