25788699688769 has 2 divisors, whose sum is σ = 25788699688770. Its totient is φ = 25788699688768.

The previous prime is 25788699688751. The next prime is 25788699688777. The reversal of 25788699688769 is 96788699688752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25503388807744 + 285310881025 = 5050088^2 + 534145^2 .

It is a cyclic number.

It is not a de Polignac number, because 25788699688769 - 2⁸ = 25788699688513 is a prime.

It is a super-2 number, since 2×25788699688769² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25788699688669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12894349844384 + 12894349844385.

It is an arithmetic number, because the mean of its divisors is an integer number (12894349844385).

Almost surely, 2^{25788699688769} is an apocalyptic number.

It is an amenable number.

25788699688769 is a deficient number, since it is larger than the sum of its proper divisors (1).

25788699688769 is an equidigital number, since it uses as much as digits as its factorization.

25788699688769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 316036546560, while the sum is 98.

The spelling of 25788699688769 in words is "twenty-five trillion, seven hundred eighty-eight billion, six hundred ninety-nine million, six hundred eighty-eight thousand, seven hundred sixty-nine".