12684612615 has 16 divisors (see below), whose sum is σ = 20995221600. Its totient is φ = 6531846272.

The previous prime is 12684612599. The next prime is 12684612623. The reversal of 12684612615 is 51621648621.

12684612615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12684612615 - 2⁴ = 12684612599 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14579580 + ... + 14580449.

It is an arithmetic number, because the mean of its divisors is an integer number (1312201350).

Almost surely, 2^12684612615 is an apocalyptic number.

12684612615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12684612615 is a deficient number, since it is larger than the sum of its proper divisors (8310608985).

12684612615 is a wasteful number, since it uses less digits than its factorization.

12684612615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29160066.

The product of its digits is 138240, while the sum is 42.

The spelling of 12684612615 in words is "twelve billion, six hundred eighty-four million, six hundred twelve thousand, six hundred fifteen".