12776928677 has 2 divisors, whose sum is σ = 12776928678. Its totient is φ = 12776928676.

The previous prime is 12776928643. The next prime is 12776928691. The reversal of 12776928677 is 77682967721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9453867361 + 3323061316 = 97231^2 + 57646^2 .

It is an emirp because it is prime and its reverse (77682967721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12776928677 - 2³² = 8481961381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12776925677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6388464338 + 6388464339.

It is an arithmetic number, because the mean of its divisors is an integer number (6388464339).

Almost surely, 2^12776928677 is an apocalyptic number.

It is an amenable number.

12776928677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12776928677 is an equidigital number, since it uses as much as digits as its factorization.

12776928677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24893568, while the sum is 62.

The spelling of 12776928677 in words is "twelve billion, seven hundred seventy-six million, nine hundred twenty-eight thousand, six hundred seventy-seven".