68168217701 has 2 divisors, whose sum is σ = 68168217702. Its totient is φ = 68168217700.

The previous prime is 68168217661. The next prime is 68168217757. The reversal of 68168217701 is 10771286186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68082377476 + 85840225 = 260926^2 + 9265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68168217701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68168217791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34084108850 + 34084108851.

It is an arithmetic number, because the mean of its divisors is an integer number (34084108851).

Almost surely, 2^68168217701 is an apocalyptic number.

It is an amenable number.

68168217701 is a deficient number, since it is larger than the sum of its proper divisors (1).

68168217701 is an equidigital number, since it uses as much as digits as its factorization.

68168217701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 68168217701 in words is "sixty-eight billion, one hundred sixty-eight million, two hundred seventeen thousand, seven hundred one".