12868108515 has 48 divisors (see below), whose sum is σ = 22843394496. Its totient is φ = 6699168000.

The previous prime is 12868108489. The next prime is 12868108543. The reversal of 12868108515 is 51580186821.

12868108515 is a `hidden beast` number, since 1 + 28 + 6 + 8 + 108 + 515 = 666.

It is not a de Polignac number, because 12868108515 - 2⁷ = 12868108387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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, 302757 + ... + 342633.

It is an arithmetic number, because the mean of its divisors is an integer number (475904052).

Almost surely, 2^12868108515 is an apocalyptic number.

12868108515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12868108515 is a deficient number, since it is larger than the sum of its proper divisors (9975285981).

12868108515 is a wasteful number, since it uses less digits than its factorization.

12868108515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40060 (or 40057 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 45.

The spelling of 12868108515 in words is "twelve billion, eight hundred sixty-eight million, one hundred eight thousand, five hundred fifteen".