12615266913 has 4 divisors (see below), whose sum is σ = 16820355888. Its totient is φ = 8410177940.

The previous prime is 12615266903. The next prime is 12615266947. The reversal of 12615266913 is 31966251621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12615266913 - 2¹⁰ = 12615265889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12615266903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2102544483 + ... + 2102544488.

It is an arithmetic number, because the mean of its divisors is an integer number (4205088972).

Almost surely, 2^12615266913 is an apocalyptic number.

It is an amenable number.

12615266913 is a deficient number, since it is larger than the sum of its proper divisors (4205088975).

12615266913 is an equidigital number, since it uses as much as digits as its factorization.

12615266913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205088974.

The product of its digits is 116640, while the sum is 42.

The spelling of 12615266913 in words is "twelve billion, six hundred fifteen million, two hundred sixty-six thousand, nine hundred thirteen".