1311531138795 has 16 divisors (see below), whose sum is σ = 2155164683040. Its totient is φ = 680578320384.

The previous prime is 1311531138763. The next prime is 1311531138817. The reversal of 1311531138795 is 5978311351131.

It is not a de Polignac number, because 1311531138795 - 2⁵ = 1311531138763 is a prime.

It is a super-2 number, since 2×1311531138795² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1181559030 + ... + 1181560139.

It is an arithmetic number, because the mean of its divisors is an integer number (134697792690).

Almost surely, 2^{1311531138795} is an apocalyptic number.

1311531138795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311531138795 is a deficient number, since it is larger than the sum of its proper divisors (843633544245).

1311531138795 is a wasteful number, since it uses less digits than its factorization.

1311531138795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363119214.

The product of its digits is 340200, while the sum is 48.

The spelling of 1311531138795 in words is "one trillion, three hundred eleven billion, five hundred thirty-one million, one hundred thirty-eight thousand, seven hundred ninety-five".