12779973535 has 32 divisors (see below), whose sum is σ = 17713935360. Its totient is φ = 8670074112.

The previous prime is 12779973473. The next prime is 12779973559. The reversal of 12779973535 is 53537997721.

It is not a de Polignac number, because 12779973535 - 2⁷ = 12779973407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12779973535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3619651 + ... + 3623179.

It is an arithmetic number, because the mean of its divisors is an integer number (553560480).

Almost surely, 2^12779973535 is an apocalyptic number.

12779973535 is a deficient number, since it is larger than the sum of its proper divisors (4933961825).

12779973535 is a wasteful number, since it uses less digits than its factorization.

12779973535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615.

The product of its digits is 12502350, while the sum is 58.

The spelling of 12779973535 in words is "twelve billion, seven hundred seventy-nine million, nine hundred seventy-three thousand, five hundred thirty-five".