12515515245 has 48 divisors (see below), whose sum is σ = 22114709760. Its totient is φ = 6546241152.

The previous prime is 12515515231. The next prime is 12515515247. The reversal of 12515515245 is 54251551521.

12515515245 is a `hidden beast` number, since 1 + 2 + 51 + 551 + 52 + 4 + 5 = 666.

It is not a de Polignac number, because 12515515245 - 2²⁰ = 12514466669 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515515247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 681372 + ... + 699498.

It is an arithmetic number, because the mean of its divisors is an integer number (460723120).

Almost surely, 2^12515515245 is an apocalyptic number.

12515515245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12515515245 is a deficient number, since it is larger than the sum of its proper divisors (9599194515).

12515515245 is a wasteful number, since it uses less digits than its factorization.

12515515245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18434 (or 18431 counting only the distinct ones).

The product of its digits is 50000, while the sum is 36.

The spelling of 12515515245 in words is "twelve billion, five hundred fifteen million, five hundred fifteen thousand, two hundred forty-five".