11585316959 has 4 divisors (see below), whose sum is σ = 12089026416. Its totient is φ = 11081607504.

The previous prime is 11585316949. The next prime is 11585316979. The reversal of 11585316959 is 95961358511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95961358511 = 659 ⋅145616629.

It is a cyclic number.

It is not a de Polignac number, because 11585316959 - 2²⁰ = 11584268383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11585316959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11585316949) 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, 251854694 + ... + 251854739.

It is an arithmetic number, because the mean of its divisors is an integer number (3022256604).

Almost surely, 2^11585316959 is an apocalyptic number.

11585316959 is a deficient number, since it is larger than the sum of its proper divisors (503709457).

11585316959 is an equidigital number, since it uses as much as digits as its factorization.

11585316959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503709456.

The product of its digits is 1458000, while the sum is 53.

The spelling of 11585316959 in words is "eleven billion, five hundred eighty-five million, three hundred sixteen thousand, nine hundred fifty-nine".