6444168769 has 2 divisors, whose sum is σ = 6444168770. Its totient is φ = 6444168768.

The previous prime is 6444168749. The next prime is 6444168791. The reversal of 6444168769 is 9678614446.

6444168769 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6175602225 + 268566544 = 78585^2 + 16388^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444168769 - 2⁵ = 6444168737 is a prime.

It is a super-2 number, since 2×6444168769² = 83054622246709950722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6444168739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222084384 + 3222084385.

It is an arithmetic number, because the mean of its divisors is an integer number (3222084385).

Almost surely, 2^6444168769 is an apocalyptic number.

It is an amenable number.

6444168769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444168769 is an equidigital number, since it uses as much as digits as its factorization.

6444168769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 55.

The square root of 6444168769 is about 80275.5801536183. The cubic root of 6444168769 is about 1860.8968551288.

The spelling of 6444168769 in words is "six billion, four hundred forty-four million, one hundred sixty-eight thousand, seven hundred sixty-nine".