11501000520 has 64 divisors (see below), whose sum is σ = 34634286720. Its totient is φ = 3055263744.

The previous prime is 11501000519. The next prime is 11501000549. The reversal of 11501000520 is 2500010511.

It is a super-2 number, since 2×11501000520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11501000520.

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, 150649 + ... + 213768.

It is an arithmetic number, because the mean of its divisors is an integer number (541160730).

Almost surely, 2^11501000520 is an apocalyptic number.

11501000520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11501000520 is an abundant number, since it is smaller than the sum of its proper divisors (23133286200).

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

11501000520 is a wasteful number, since it uses less digits than its factorization.

11501000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364694 (or 364690 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

Subtracting from 11501000520 its reverse (2500010511), we obtain a palindrome (9000990009).

The spelling of 11501000520 in words is "eleven billion, five hundred one million, five hundred twenty", and thus it is an aban number.