12515280650 has 12 divisors (see below), whose sum is σ = 23278422102. Its totient is φ = 5006112240.

The previous prime is 12515280607. The next prime is 12515280703. The reversal of 12515280650 is 5608251521.

It can be written as a sum of positive squares in 3 ways, for example, as 5807506849 + 6707773801 = 76207^2 + 81901^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12515280650.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125152757 + ... + 125152856.

Almost surely, 2^12515280650 is an apocalyptic number.

12515280650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12515280650 is a deficient number, since it is larger than the sum of its proper divisors (10763141452).

12515280650 is a wasteful number, since it uses less digits than its factorization.

12515280650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250305625 (or 250305620 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 35.

The spelling of 12515280650 in words is "twelve billion, five hundred fifteen million, two hundred eighty thousand, six hundred fifty".