11513756520 has 96 divisors (see below), whose sum is σ = 42765390720. Its totient is φ = 2631715200.

The previous prime is 11513756519. The next prime is 11513756557. The reversal of 11513756520 is 2565731511.

It is a happy number.

11513756520 is a `hidden beast` number, since 1 + 1 + 51 + 37 + 56 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2281956 + ... + 2286995.

It is an arithmetic number, because the mean of its divisors is an integer number (445472820).

Almost surely, 2^11513756520 is an apocalyptic number.

11513756520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11513756520 is an abundant number, since it is smaller than the sum of its proper divisors (31251634200).

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

11513756520 is a wasteful number, since it uses less digits than its factorization.

11513756520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4568975 (or 4568968 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The spelling of 11513756520 in words is "eleven billion, five hundred thirteen million, seven hundred fifty-six thousand, five hundred twenty".