12515520432 has 20 divisors (see below), whose sum is σ = 32331761240. Its totient is φ = 4171840128.

The previous prime is 12515520427. The next prime is 12515520439. The reversal of 12515520432 is 23402551521.

It is a self number, because there is not a number n which added to its sum of digits gives 12515520432.

It is not an unprimeable number, because it can be changed into a prime (12515520439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130369957 + ... + 130370052.

It is an arithmetic number, because the mean of its divisors is an integer number (1616588062).

Almost surely, 2^12515520432 is an apocalyptic number.

12515520432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12515520432 is an abundant number, since it is smaller than the sum of its proper divisors (19816240808).

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

12515520432 is a wasteful number, since it uses less digits than its factorization.

12515520432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260740020 (or 260740014 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 12515520432 in words is "twelve billion, five hundred fifteen million, five hundred twenty thousand, four hundred thirty-two".