6438075169 has 2 divisors, whose sum is σ = 6438075170. Its totient is φ = 6438075168.

The previous prime is 6438075131. The next prime is 6438075187. The reversal of 6438075169 is 9615708346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3967488144 + 2470587025 = 62988^2 + 49705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6438075169 is a prime.

It is a super-2 number, since 2×6438075169² = 82897623763388757122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6438075269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219037584 + 3219037585.

It is an arithmetic number, because the mean of its divisors is an integer number (3219037585).

Almost surely, 2^6438075169 is an apocalyptic number.

It is an amenable number.

6438075169 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438075169 is an equidigital number, since it uses as much as digits as its factorization.

6438075169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 6438075169 is about 80237.6169199958. The cubic root of 6438075169 is about 1860.3101160376.

The spelling of 6438075169 in words is "six billion, four hundred thirty-eight million, seventy-five thousand, one hundred sixty-nine".