8159749857769 has 2 divisors, whose sum is σ = 8159749857770. Its totient is φ = 8159749857768.

The previous prime is 8159749857739. The next prime is 8159749857799. The reversal of 8159749857769 is 9677589479518.

It is a balanced prime because it is at equal distance from previous prime (8159749857739) and next prime (8159749857799).

It can be written as a sum of positive squares in only one way, i.e., 6684525848025 + 1475224009744 = 2585445^2 + 1214588^2 .

It is a cyclic number.

It is not a de Polignac number, because 8159749857769 - 2⁵ = 8159749857737 is a prime.

It is a super-2 number, since 2×8159749857769² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8159749857739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079874928884 + 4079874928885.

It is an arithmetic number, because the mean of its divisors is an integer number (4079874928885).

Almost surely, 2^{8159749857769} is an apocalyptic number.

It is an amenable number.

8159749857769 is a deficient number, since it is larger than the sum of its proper divisors (1).

8159749857769 is an equidigital number, since it uses as much as digits as its factorization.

8159749857769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9601804800, while the sum is 85.

The spelling of 8159749857769 in words is "eight trillion, one hundred fifty-nine billion, seven hundred forty-nine million, eight hundred fifty-seven thousand, seven hundred sixty-nine".