12780879686 has 4 divisors (see below), whose sum is σ = 19171319532. Its totient is φ = 6390439842.

The previous prime is 12780879653. The next prime is 12780879703. The reversal of 12780879686 is 68697808721.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195219920 + ... + 3195219923.

It is an arithmetic number, because the mean of its divisors is an integer number (4792829883).

Almost surely, 2^12780879686 is an apocalyptic number.

12780879686 is a deficient number, since it is larger than the sum of its proper divisors (6390439846).

12780879686 is an equidigital number, since it uses as much as digits as its factorization.

12780879686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390439845.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 12780879686 in words is "twelve billion, seven hundred eighty million, eight hundred seventy-nine thousand, six hundred eighty-six".