1317135856 has 10 divisors (see below), whose sum is σ = 2551950752. Its totient is φ = 658567920.

The previous prime is 1317135821. The next prime is 1317135857. The reversal of 1317135856 is 6585317131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317135857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41160480 + ... + 41160511.

Almost surely, 2^1317135856 is an apocalyptic number.

1317135856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1317135856 is a deficient number, since it is larger than the sum of its proper divisors (1234814896).

1317135856 is an equidigital number, since it uses as much as digits as its factorization.

1317135856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82320999 (or 82320993 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 1317135856 is about 36292.3663598835. The cubic root of 1317135856 is about 1096.1673381874.

The spelling of 1317135856 in words is "one billion, three hundred seventeen million, one hundred thirty-five thousand, eight hundred fifty-six".