12756371777 has 2 divisors, whose sum is σ = 12756371778. Its totient is φ = 12756371776.

The previous prime is 12756371773. The next prime is 12756371807. The reversal of 12756371777 is 77717365721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12631736881 + 124634896 = 112391^2 + 11164^2 .

It is a cyclic number.

It is not a de Polignac number, because 12756371777 - 2² = 12756371773 is a prime.

It is not a weakly prime, because it can be changed into another prime (12756371773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6378185888 + 6378185889.

It is an arithmetic number, because the mean of its divisors is an integer number (6378185889).

Almost surely, 2^12756371777 is an apocalyptic number.

It is an amenable number.

12756371777 is a deficient number, since it is larger than the sum of its proper divisors (1).

12756371777 is an equidigital number, since it uses as much as digits as its factorization.

12756371777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3025260, while the sum is 53.

The spelling of 12756371777 in words is "twelve billion, seven hundred fifty-six million, three hundred seventy-one thousand, seven hundred seventy-seven".