26305198369 has 2 divisors, whose sum is σ = 26305198370. Its totient is φ = 26305198368.

The previous prime is 26305198331. The next prime is 26305198379. The reversal of 26305198369 is 96389150362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26302352400 + 2845969 = 162180^2 + 1687^2 .

It is a cyclic number.

It is not a de Polignac number, because 26305198369 - 2²¹ = 26303101217 is a prime.

It is a super-2 number, since 2×26305198369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26305198379) 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, 13152599184 + 13152599185.

It is an arithmetic number, because the mean of its divisors is an integer number (13152599185).

Almost surely, 2^26305198369 is an apocalyptic number.

It is an amenable number.

26305198369 is a deficient number, since it is larger than the sum of its proper divisors (1).

26305198369 is an equidigital number, since it uses as much as digits as its factorization.

26305198369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 26305198369 in words is "twenty-six billion, three hundred five million, one hundred ninety-eight thousand, three hundred sixty-nine".