11513768765 has 12 divisors (see below), whose sum is σ = 14025844476. Its totient is φ = 9073519488.

The previous prime is 11513768753. The next prime is 11513768779. The reversal of 11513768765 is 56786731511.

It can be written as a sum of positive squares in 2 ways, for example, as 6714327481 + 4799441284 = 81941^2 + 69278^2 .

It is not a de Polignac number, because 11513768765 - 2⁸ = 11513768509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234044 + ... + 278933.

It is an arithmetic number, because the mean of its divisors is an integer number (1168820373).

Almost surely, 2^11513768765 is an apocalyptic number.

It is an amenable number.

11513768765 is a deficient number, since it is larger than the sum of its proper divisors (2512075711).

11513768765 is an frugal number, since it uses more digits than its factorization.

11513768765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513116 (or 513049 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The spelling of 11513768765 in words is "eleven billion, five hundred thirteen million, seven hundred sixty-eight thousand, seven hundred sixty-five".