12786456679 has 4 divisors (see below), whose sum is σ = 12977299384. Its totient is φ = 12595613976.

The previous prime is 12786456629. The next prime is 12786456691. The reversal of 12786456679 is 97665468721.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12786456679 - 2⁹ = 12786456167 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 (12786456629) 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, 95421252 + ... + 95421385.

It is an arithmetic number, because the mean of its divisors is an integer number (3244324846).

Almost surely, 2^12786456679 is an apocalyptic number.

12786456679 is a deficient number, since it is larger than the sum of its proper divisors (190842705).

12786456679 is an equidigital number, since it uses as much as digits as its factorization.

12786456679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190842704.

The product of its digits is 30481920, while the sum is 61.

The spelling of 12786456679 in words is "twelve billion, seven hundred eighty-six million, four hundred fifty-six thousand, six hundred seventy-nine".