12651402515 has 4 divisors (see below), whose sum is σ = 15181683024. Its totient is φ = 10121122008.

The previous prime is 12651402497. The next prime is 12651402521. The reversal of 12651402515 is 51520415621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51520415621 = 31 ⋅1661948891.

It is a cyclic number.

It is not a de Polignac number, because 12651402515 - 2¹⁰ = 12651401491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265140247 + ... + 1265140256.

It is an arithmetic number, because the mean of its divisors is an integer number (3795420756).

Almost surely, 2^12651402515 is an apocalyptic number.

12651402515 is a deficient number, since it is larger than the sum of its proper divisors (2530280509).

12651402515 is an equidigital number, since it uses as much as digits as its factorization.

12651402515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530280508.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 12651402515 in words is "twelve billion, six hundred fifty-one million, four hundred two thousand, five hundred fifteen".