12515974632 has 128 divisors (see below), whose sum is σ = 40384915200. Its totient is φ = 3517344000.

The previous prime is 12515974609. The next prime is 12515974673. The reversal of 12515974632 is 23647951521.

12515974632 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 5 + 9 + 7 + 4 + 632 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24382 + ... + 160082.

It is an arithmetic number, because the mean of its divisors is an integer number (315507150).

Almost surely, 2^12515974632 is an apocalyptic number.

12515974632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12515974632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20192457600).

12515974632 is an abundant number, since it is smaller than the sum of its proper divisors (27868940568).

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

12515974632 is a wasteful number, since it uses less digits than its factorization.

12515974632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135784 (or 135774 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 12515974632 in words is "twelve billion, five hundred fifteen million, nine hundred seventy-four thousand, six hundred thirty-two".