12912888778779 has 16 divisors (see below), whose sum is σ = 18782455676544. Its totient is φ = 7825963200000.

The previous prime is 12912888778753. The next prime is 12912888778817. The reversal of 12912888778779 is 97787788821921.

It is not a de Polignac number, because 12912888778779 - 2⁷ = 12912888778651 is a prime.

It is a super-2 number, since 2×12912888778779² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12912888778729) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10514427 + ... + 11678139.

It is an arithmetic number, because the mean of its divisors is an integer number (1173903479784).

Almost surely, 2^{12912888778779} is an apocalyptic number.

12912888778779 is a deficient number, since it is larger than the sum of its proper divisors (5869566897765).

12912888778779 is a wasteful number, since it uses less digits than its factorization.

12912888778779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499978.

The product of its digits is 3186376704, while the sum is 84.

The spelling of 12912888778779 in words is "twelve trillion, nine hundred twelve billion, eight hundred eighty-eight million, seven hundred seventy-eight thousand, seven hundred seventy-nine".