12515933808 has 320 divisors, whose sum is σ = 42374430720. Its totient is φ = 3462974208.

The previous prime is 12515933779. The next prime is 12515933809. The reversal of 12515933808 is 80833951521.

12515933808 is a `hidden beast` number, since 1 + 2 + 51 + 593 + 3 + 8 + 0 + 8 = 666.

12515933808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515933809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15207285 + ... + 15208107.

It is an arithmetic number, because the mean of its divisors is an integer number (132420096).

Almost surely, 2^12515933808 is an apocalyptic number.

12515933808 is a gapful number since it is divisible by the number (18) 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 12515933808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21187215360).

12515933808 is an abundant number, since it is smaller than the sum of its proper divisors (29858496912).

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

12515933808 is a wasteful number, since it uses less digits than its factorization.

12515933808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 12515933808 in words is "twelve billion, five hundred fifteen million, nine hundred thirty-three thousand, eight hundred eight".