12695244761 has 2 divisors, whose sum is σ = 12695244762. Its totient is φ = 12695244760.

The previous prime is 12695244733. The next prime is 12695244773. The reversal of 12695244761 is 16744259621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10781707225 + 1913537536 = 103835^2 + 43744^2 .

It is a cyclic number.

It is not a de Polignac number, because 12695244761 - 2¹⁸ = 12694982617 is a prime.

It is a super-2 number, since 2×12695244761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12695244461) 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, 6347622380 + 6347622381.

It is an arithmetic number, because the mean of its divisors is an integer number (6347622381).

Almost surely, 2^12695244761 is an apocalyptic number.

It is an amenable number.

12695244761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12695244761 is an equidigital number, since it uses as much as digits as its factorization.

12695244761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The spelling of 12695244761 in words is "twelve billion, six hundred ninety-five million, two hundred forty-four thousand, seven hundred sixty-one".