11505140520 has 32 divisors (see below), whose sum is σ = 34515421920. Its totient is φ = 3068037440.

The previous prime is 11505140483. The next prime is 11505140527. The reversal of 11505140520 is 2504150511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (11505140527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47937966 + ... + 47938205.

It is an arithmetic number, because the mean of its divisors is an integer number (1078606935).

Almost surely, 2^11505140520 is an apocalyptic number.

11505140520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11505140520 is an abundant number, since it is smaller than the sum of its proper divisors (23010281400).

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

11505140520 is a wasteful number, since it uses less digits than its factorization.

11505140520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95876185 (or 95876181 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Subtracting from 11505140520 its reverse (2504150511), we obtain a palindrome (9000990009).

The spelling of 11505140520 in words is "eleven billion, five hundred five million, one hundred forty thousand, five hundred twenty".