12777317177 has 2 divisors, whose sum is σ = 12777317178. Its totient is φ = 12777317176.

The previous prime is 12777317101. The next prime is 12777317197. The reversal of 12777317177 is 77171377721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12632860816 + 144456361 = 112396^2 + 12019^2 .

It is a cyclic number.

It is not a de Polignac number, because 12777317177 - 2³² = 8482349881 is a prime.

It is not a weakly prime, because it can be changed into another prime (12777317197) 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, 6388658588 + 6388658589.

It is an arithmetic number, because the mean of its divisors is an integer number (6388658589).

Almost surely, 2^12777317177 is an apocalyptic number.

It is an amenable number.

12777317177 is a deficient number, since it is larger than the sum of its proper divisors (1).

12777317177 is an equidigital number, since it uses as much as digits as its factorization.

12777317177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705894, while the sum is 50.

The spelling of 12777317177 in words is "twelve billion, seven hundred seventy-seven million, three hundred seventeen thousand, one hundred seventy-seven".