12977978077 has 2 divisors, whose sum is σ = 12977978078. Its totient is φ = 12977978076.

The previous prime is 12977978059. The next prime is 12977978087. The reversal of 12977978077 is 77087977921.

12977978077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11504493081 + 1473484996 = 107259^2 + 38386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12977978077 - 2¹⁹ = 12977453789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12977978047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6488989038 + 6488989039.

It is an arithmetic number, because the mean of its divisors is an integer number (6488989039).

Almost surely, 2^12977978077 is an apocalyptic number.

It is an amenable number.

12977978077 is a deficient number, since it is larger than the sum of its proper divisors (1).

12977978077 is an equidigital number, since it uses as much as digits as its factorization.

12977978077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21781872, while the sum is 64.

The spelling of 12977978077 in words is "twelve billion, nine hundred seventy-seven million, nine hundred seventy-eight thousand, seventy-seven".