768860661169 has 2 divisors, whose sum is σ = 768860661170. Its totient is φ = 768860661168.

The previous prime is 768860661167. The next prime is 768860661253. The reversal of 768860661169 is 961166068867.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387801371169 + 381059290000 = 622737^2 + 617300^2 .

It is an emirp because it is prime and its reverse (961166068867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768860661169 - 2¹ = 768860661167 is a prime.

It is a super-2 number, since 2×768860661169² (a number of 25 digits) contains 22 as substring.

Together with 768860661167, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 768860661169.

It is not a weakly prime, because it can be changed into another prime (768860661161) 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, 384430330584 + 384430330585.

It is an arithmetic number, because the mean of its divisors is an integer number (384430330585).

Almost surely, 2^768860661169 is an apocalyptic number.

It is an amenable number.

768860661169 is a deficient number, since it is larger than the sum of its proper divisors (1).

768860661169 is an equidigital number, since it uses as much as digits as its factorization.

768860661169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 768860661169 in words is "seven hundred sixty-eight billion, eight hundred sixty million, six hundred sixty-one thousand, one hundred sixty-nine".