13261790668369 has 2 divisors, whose sum is σ = 13261790668370. Its totient is φ = 13261790668368.

The previous prime is 13261790668367. The next prime is 13261790668447. The reversal of 13261790668369 is 96386609716231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8396589949969 + 4865200718400 = 2897687^2 + 2205720^2 .

It is a cyclic number.

It is not a de Polignac number, because 13261790668369 - 2¹ = 13261790668367 is a prime.

It is a super-2 number, since 2×13261790668369² (a number of 27 digits) contains 22 as substring.

Together with 13261790668367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13261790668363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630895334184 + 6630895334185.

It is an arithmetic number, because the mean of its divisors is an integer number (6630895334185).

Almost surely, 2^{13261790668369} is an apocalyptic number.

It is an amenable number.

13261790668369 is a deficient number, since it is larger than the sum of its proper divisors (1).

13261790668369 is an equidigital number, since it uses as much as digits as its factorization.

13261790668369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 67.

The spelling of 13261790668369 in words is "thirteen trillion, two hundred sixty-one billion, seven hundred ninety million, six hundred sixty-eight thousand, three hundred sixty-nine".