12778762779 has 12 divisors (see below), whose sum is σ = 18957084016. Its totient is φ = 8288926992.

The previous prime is 12778762769. The next prime is 12778762807. The reversal of 12778762779 is 97726787721.

It is not a de Polignac number, because 12778762779 - 2⁸ = 12778762523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12778762769) 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 11 ways as a sum of consecutive naturals, for example, 19186999 + ... + 19187664.

Almost surely, 2^12778762779 is an apocalyptic number.

12778762779 is a deficient number, since it is larger than the sum of its proper divisors (6178321237).

12778762779 is a wasteful number, since it uses less digits than its factorization.

12778762779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38374706 (or 38374703 counting only the distinct ones).

The product of its digits is 29042496, while the sum is 63.

The spelling of 12778762779 in words is "twelve billion, seven hundred seventy-eight million, seven hundred sixty-two thousand, seven hundred seventy-nine".