68659702128089 has 2 divisors, whose sum is σ = 68659702128090. Its totient is φ = 68659702128088.

The previous prime is 68659702128077. The next prime is 68659702128109. The reversal of 68659702128089 is 98082120795686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66780930241600 + 1878771886489 = 8171960^2 + 1370683^2 .

It is a cyclic number.

It is not a de Polignac number, because 68659702128089 - 2²⁴ = 68659685350873 is a prime.

It is not a weakly prime, because it can be changed into another prime (68659702128029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34329851064044 + 34329851064045.

It is an arithmetic number, because the mean of its divisors is an integer number (34329851064045).

Almost surely, 2^{68659702128089} is an apocalyptic number.

It is an amenable number.

68659702128089 is a deficient number, since it is larger than the sum of its proper divisors (1).

68659702128089 is an equidigital number, since it uses as much as digits as its factorization.

68659702128089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 71.

The spelling of 68659702128089 in words is "sixty-eight trillion, six hundred fifty-nine billion, seven hundred two million, one hundred twenty-eight thousand, eighty-nine".