68165244256169 has 2 divisors, whose sum is σ = 68165244256170. Its totient is φ = 68165244256168.

The previous prime is 68165244256159. The next prime is 68165244256201. The reversal of 68165244256169 is 96165244256186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60555166158400 + 7610078097769 = 7781720^2 + 2758637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68165244256169 is a prime.

It is a super-2 number, since 2×68165244256169² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68165244256159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34082622128084 + 34082622128085.

It is an arithmetic number, because the mean of its divisors is an integer number (34082622128085).

Almost surely, 2^{68165244256169} is an apocalyptic number.

It is an amenable number.

68165244256169 is a deficient number, since it is larger than the sum of its proper divisors (1).

68165244256169 is an equidigital number, since it uses as much as digits as its factorization.

68165244256169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149299200, while the sum is 65.

The spelling of 68165244256169 in words is "sixty-eight trillion, one hundred sixty-five billion, two hundred forty-four million, two hundred fifty-six thousand, one hundred sixty-nine".