12779120868 has 12 divisors (see below), whose sum is σ = 29817948720. Its totient is φ = 4259706952.

The previous prime is 12779120857. The next prime is 12779120899. The reversal of 12779120868 is 86802197721.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×12779120868³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12779120868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532463358 + ... + 532463381.

It is an arithmetic number, because the mean of its divisors is an integer number (2484829060).

Almost surely, 2^12779120868 is an apocalyptic number.

It is an amenable number.

12779120868 is an abundant number, since it is smaller than the sum of its proper divisors (17038827852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12779120868 is a wasteful number, since it uses less digits than its factorization.

12779120868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064926746 (or 1064926744 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 12779120868 in words is "twelve billion, seven hundred seventy-nine million, one hundred twenty thousand, eight hundred sixty-eight".