8226685968409 has 2 divisors, whose sum is σ = 8226685968410. Its totient is φ = 8226685968408.

The previous prime is 8226685968353. The next prime is 8226685968419. The reversal of 8226685968409 is 9048695866228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8226685968400 + 9 = 2868220^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 8226685968409 - 2¹¹ = 8226685966361 is a prime.

It is a super-2 number, since 2×8226685968409² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8226685968419) 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, 4113342984204 + 4113342984205.

It is an arithmetic number, because the mean of its divisors is an integer number (4113342984205).

Almost surely, 2^{8226685968409} is an apocalyptic number.

It is an amenable number.

8226685968409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8226685968409 is an equidigital number, since it uses as much as digits as its factorization.

8226685968409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 716636160, while the sum is 73.

The spelling of 8226685968409 in words is "eight trillion, two hundred twenty-six billion, six hundred eighty-five million, nine hundred sixty-eight thousand, four hundred nine".