68165377349 has 2 divisors, whose sum is σ = 68165377350. Its totient is φ = 68165377348.

The previous prime is 68165377333. The next prime is 68165377351. The reversal of 68165377349 is 94377356186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66348486724 + 1816890625 = 257582^2 + 42625^2 .

It is a cyclic number.

It is not a de Polignac number, because 68165377349 - 2⁴ = 68165377333 is a prime.

Together with 68165377351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68165377849) 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, 34082688674 + 34082688675.

It is an arithmetic number, because the mean of its divisors is an integer number (34082688675).

Almost surely, 2^68165377349 is an apocalyptic number.

It is an amenable number.

68165377349 is a deficient number, since it is larger than the sum of its proper divisors (1).

68165377349 is an equidigital number, since it uses as much as digits as its factorization.

68165377349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 59.

The spelling of 68165377349 in words is "sixty-eight billion, one hundred sixty-five million, three hundred seventy-seven thousand, three hundred forty-nine".