68035929977 has 2 divisors, whose sum is σ = 68035929978. Its totient is φ = 68035929976.

The previous prime is 68035929971. The next prime is 68035930043. The reversal of 68035929977 is 77992953086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67739952361 + 295977616 = 260269^2 + 17204^2 .

It is a cyclic number.

It is not a de Polignac number, because 68035929977 - 2²⁰ = 68034881401 is a prime.

It is not a weakly prime, because it can be changed into another prime (68035929971) 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, 34017964988 + 34017964989.

It is an arithmetic number, because the mean of its divisors is an integer number (34017964989).

Almost surely, 2^68035929977 is an apocalyptic number.

It is an amenable number.

68035929977 is a deficient number, since it is larger than the sum of its proper divisors (1).

68035929977 is an equidigital number, since it uses as much as digits as its factorization.

68035929977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51438240, while the sum is 65.

The spelling of 68035929977 in words is "sixty-eight billion, thirty-five million, nine hundred twenty-nine thousand, nine hundred seventy-seven".