12566426636423 has 4 divisors (see below), whose sum is σ = 13708829057928. Its totient is φ = 11424024214920.

The previous prime is 12566426636417. The next prime is 12566426636429. The reversal of 12566426636423 is 32463662466521.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12566426636417) and next prime (12566426636429).

It is a cyclic number.

It is not a de Polignac number, because 12566426636423 - 2³⁰ = 12565352894599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566426636429) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 571201210736 + ... + 571201210757.

It is an arithmetic number, because the mean of its divisors is an integer number (3427207264482).

Almost surely, 2^{12566426636423} is an apocalyptic number.

12566426636423 is a deficient number, since it is larger than the sum of its proper divisors (1142402421505).

12566426636423 is a wasteful number, since it uses less digits than its factorization.

12566426636423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142402421504.

The product of its digits is 44789760, while the sum is 56.

The spelling of 12566426636423 in words is "twelve trillion, five hundred sixty-six billion, four hundred twenty-six million, six hundred thirty-six thousand, four hundred twenty-three".