12776928691 has 2 divisors, whose sum is σ = 12776928692. Its totient is φ = 12776928690.

The previous prime is 12776928677. The next prime is 12776928701. The reversal of 12776928691 is 19682967721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12776928691 - 2²⁷ = 12642710963 is a prime.

It is not a weakly prime, because it can be changed into another prime (12776928601) 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 as a sum of consecutive naturals, namely, 6388464345 + 6388464346.

It is an arithmetic number, because the mean of its divisors is an integer number (6388464346).

Almost surely, 2^12776928691 is an apocalyptic number.

12776928691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12776928691 is an equidigital number, since it uses as much as digits as its factorization.

12776928691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 58.

The spelling of 12776928691 in words is "twelve billion, seven hundred seventy-six million, nine hundred twenty-eight thousand, six hundred ninety-one".