12563426013 has 4 divisors (see below), whose sum is σ = 16751234688. Its totient is φ = 8375617340.

The previous prime is 12563426009. The next prime is 12563426021. The reversal of 12563426013 is 31062436521.

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 12563426013 - 2² = 12563426009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12563426063) 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, 2093904333 + ... + 2093904338.

It is an arithmetic number, because the mean of its divisors is an integer number (4187808672).

Almost surely, 2^12563426013 is an apocalyptic number.

It is an amenable number.

12563426013 is a deficient number, since it is larger than the sum of its proper divisors (4187808675).

12563426013 is an equidigital number, since it uses as much as digits as its factorization.

12563426013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187808674.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 12563426013 in words is "twelve billion, five hundred sixty-three million, four hundred twenty-six thousand, thirteen".