68739768992977 has 2 divisors, whose sum is σ = 68739768992978. Its totient is φ = 68739768992976.

The previous prime is 68739768992941. The next prime is 68739768993037. The reversal of 68739768992977 is 77929986793786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52165026271296 + 16574742721681 = 7222536^2 + 4071209^2 .

It is a cyclic number.

It is not a de Polignac number, because 68739768992977 - 2³⁹ = 68190013179089 is a prime.

It is not a weakly prime, because it can be changed into another prime (68739768912977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34369884496488 + 34369884496489.

It is an arithmetic number, because the mean of its divisors is an integer number (34369884496489).

Almost surely, 2^{68739768992977} is an apocalyptic number.

It is an amenable number.

68739768992977 is a deficient number, since it is larger than the sum of its proper divisors (1).

68739768992977 is an equidigital number, since it uses as much as digits as its factorization.

68739768992977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217768932864, while the sum is 97.

The spelling of 68739768992977 in words is "sixty-eight trillion, seven hundred thirty-nine billion, seven hundred sixty-eight million, nine hundred ninety-two thousand, nine hundred seventy-seven".