68523648169 has 2 divisors, whose sum is σ = 68523648170. Its totient is φ = 68523648168.

The previous prime is 68523648121. The next prime is 68523648199. The reversal of 68523648169 is 96184632586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41979092544 + 26544555625 = 204888^2 + 162925^2 .

It is a cyclic number.

It is not a de Polignac number, because 68523648169 - 2⁷ = 68523648041 is a prime.

It is a super-2 number, since 2×68523648169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68523648199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34261824084 + 34261824085.

It is an arithmetic number, because the mean of its divisors is an integer number (34261824085).

Almost surely, 2^68523648169 is an apocalyptic number.

It is an amenable number.

68523648169 is a deficient number, since it is larger than the sum of its proper divisors (1).

68523648169 is an equidigital number, since it uses as much as digits as its factorization.

68523648169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 58.

The spelling of 68523648169 in words is "sixty-eight billion, five hundred twenty-three million, six hundred forty-eight thousand, one hundred sixty-nine".