1068165221789 has 2 divisors, whose sum is σ = 1068165221790. Its totient is φ = 1068165221788.

The previous prime is 1068165221759. The next prime is 1068165221801. The reversal of 1068165221789 is 9871225618601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758061024889 + 310104196900 = 870667^2 + 556870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1068165221789 - 2⁸ = 1068165221533 is a prime.

It is a super-2 number, since 2×1068165221789² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1068165221719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534082610894 + 534082610895.

It is an arithmetic number, because the mean of its divisors is an integer number (534082610895).

Almost surely, 2^{1068165221789} is an apocalyptic number.

It is an amenable number.

1068165221789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1068165221789 is an equidigital number, since it uses as much as digits as its factorization.

1068165221789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 1068165221789 in words is "one trillion, sixty-eight billion, one hundred sixty-five million, two hundred twenty-one thousand, seven hundred eighty-nine".