11520312540 has 48 divisors (see below), whose sum is σ = 35189320320. Its totient is φ = 2792802880.

The previous prime is 11520312523. The next prime is 11520312547. The reversal of 11520312540 is 4521302511.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11520312540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11520312547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8726850 + ... + 8728169.

It is an arithmetic number, because the mean of its divisors is an integer number (733110840).

Almost surely, 2^11520312540 is an apocalyptic number.

11520312540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11520312540 is an abundant number, since it is smaller than the sum of its proper divisors (23669007780).

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

11520312540 is a wasteful number, since it uses less digits than its factorization.

11520312540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17455042 (or 17455040 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 11520312540 in words is "eleven billion, five hundred twenty million, three hundred twelve thousand, five hundred forty".