12777775265 has 4 divisors (see below), whose sum is σ = 15333330324. Its totient is φ = 10222220208.

The previous prime is 12777775237. The next prime is 12777775267. The reversal of 12777775265 is 56257777721.

12777775265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9376436224 + 3401339041 = 96832^2 + 58321^2 .

It is a cyclic number.

It is not a de Polignac number, because 12777775265 - 2¹⁶ = 12777709729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12777775265.

It is not an unprimeable number, because it can be changed into a prime (12777775267) 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 in 3 ways as a sum of consecutive naturals, for example, 1277777522 + ... + 1277777531.

It is an arithmetic number, because the mean of its divisors is an integer number (3833332581).

Almost surely, 2^12777775265 is an apocalyptic number.

It is an amenable number.

12777775265 is a deficient number, since it is larger than the sum of its proper divisors (2555555059).

12777775265 is an equidigital number, since it uses as much as digits as its factorization.

12777775265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555555058.

The product of its digits is 10084200, while the sum is 56.

The spelling of 12777775265 in words is "twelve billion, seven hundred seventy-seven million, seven hundred seventy-five thousand, two hundred sixty-five".