8189780568169 has 2 divisors, whose sum is σ = 8189780568170. Its totient is φ = 8189780568168.

The previous prime is 8189780568163. The next prime is 8189780568217. The reversal of 8189780568169 is 9618650879818.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7194947875600 + 994832692569 = 2682340^2 + 997413^2 .

It is a cyclic number.

It is not a de Polignac number, because 8189780568169 - 2⁷ = 8189780568041 is a prime.

It is a super-2 number, since 2×8189780568169² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8189780568095 and 8189780568104.

It is not a weakly prime, because it can be changed into another prime (8189780568163) 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, 4094890284084 + 4094890284085.

It is an arithmetic number, because the mean of its divisors is an integer number (4094890284085).

Almost surely, 2^{8189780568169} is an apocalyptic number.

It is an amenable number.

8189780568169 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189780568169 is an equidigital number, since it uses as much as digits as its factorization.

8189780568169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 418037760, while the sum is 76.

The spelling of 8189780568169 in words is "eight trillion, one hundred eighty-nine billion, seven hundred eighty million, five hundred sixty-eight thousand, one hundred sixty-nine".