11311986265 has 4 divisors (see below), whose sum is σ = 13574383524. Its totient is φ = 9049589008.

The previous prime is 11311986263. The next prime is 11311986271. The reversal of 11311986265 is 56268911311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56268911311 = 41 ⋅1372412471.

It can be written as a sum of positive squares in 2 ways, for example, as 8733276304 + 2578709961 = 93452^2 + 50781^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311986265 - 2¹ = 11311986263 is a prime.

It is a super-3 number, since 3×11311986265³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311986263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131198622 + ... + 1131198631.

It is an arithmetic number, because the mean of its divisors is an integer number (3393595881).

Almost surely, 2^11311986265 is an apocalyptic number.

It is an amenable number.

11311986265 is a deficient number, since it is larger than the sum of its proper divisors (2262397259).

11311986265 is an equidigital number, since it uses as much as digits as its factorization.

11311986265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262397258.

The product of its digits is 77760, while the sum is 43.

The spelling of 11311986265 in words is "eleven billion, three hundred eleven million, nine hundred eighty-six thousand, two hundred sixty-five".