68165377849 has 2 divisors, whose sum is σ = 68165377850. Its totient is φ = 68165377848.

The previous prime is 68165377837. The next prime is 68165377897. The reversal of 68165377849 is 94877356186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67544371449 + 621006400 = 259893^2 + 24920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68165377849 is a prime.

It is not a weakly prime, because it can be changed into another prime (68165377349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34082688924 + 34082688925.

It is an arithmetic number, because the mean of its divisors is an integer number (34082688925).

Almost surely, 2^68165377849 is an apocalyptic number.

It is an amenable number.

68165377849 is a deficient number, since it is larger than the sum of its proper divisors (1).

68165377849 is an equidigital number, since it uses as much as digits as its factorization.

68165377849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 64.

The spelling of 68165377849 in words is "sixty-eight billion, one hundred sixty-five million, three hundred seventy-seven thousand, eight hundred forty-nine".