12776911225 has 81 divisors (see below), whose sum is σ = 18015173127. Its totient is φ = 8984926080.

The previous prime is 12776911201. The next prime is 12776911261. The reversal of 12776911225 is 52211967721.

The square root of 12776911225 is 113035.

It is a perfect power (a square), and thus also a powerful number.

12776911225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 13 ways, for example, as 7373485161 + 5403426064 = 85869^2 + 73508^2 .

It is not a de Polignac number, because 12776911225 - 2¹¹ = 12776909177 is a prime.

It is an unprimeable number.

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 in 80 ways as a sum of consecutive naturals, for example, 271849152 + ... + 271849198.

Almost surely, 2^12776911225 is an apocalyptic number.

12776911225 is the 113035-th square number.

12776911225 is the 56518-th centered octagonal number.

It is an amenable number.

12776911225 is a deficient number, since it is larger than the sum of its proper divisors (5238261902).

12776911225 is an equidigital number, since it uses as much as digits as its factorization.

12776911225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 102 counting only the distinct ones).

The product of its digits is 105840, while the sum is 43.

The spelling of 12776911225 in words is "twelve billion, seven hundred seventy-six million, nine hundred eleven thousand, two hundred twenty-five".