11565160520 has 64 divisors (see below), whose sum is σ = 27589734000. Its totient is φ = 4348026880.

The previous prime is 11565160511. The next prime is 11565160549. The reversal of 11565160520 is 2506156511.

It can be written as a sum of positive squares in 8 ways, for example, as 1057680484 + 10507480036 = 32522^2 + 102506^2 .

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, 506306 + ... + 528654.

Almost surely, 2^11565160520 is an apocalyptic number.

11565160520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11565160520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13794867000).

11565160520 is an abundant number, since it is smaller than the sum of its proper divisors (16024573480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11565160520 is a wasteful number, since it uses less digits than its factorization.

11565160520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23138 (or 23134 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 11565160520 in words is "eleven billion, five hundred sixty-five million, one hundred sixty thousand, five hundred twenty".