6444432289 has 2 divisors, whose sum is σ = 6444432290. Its totient is φ = 6444432288.

The previous prime is 6444432283. The next prime is 6444432311. The reversal of 6444432289 is 9822344446.

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., 6374425600 + 70006689 = 79840^2 + 8367^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444432289 - 2²³ = 6436043681 is a prime.

It is not a weakly prime, because it can be changed into another prime (6444432283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222216144 + 3222216145.

It is an arithmetic number, because the mean of its divisors is an integer number (3222216145).

Almost surely, 2^6444432289 is an apocalyptic number.

It is an amenable number.

6444432289 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444432289 is an equidigital number, since it uses as much as digits as its factorization.

6444432289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 46.

The square root of 6444432289 is about 80277.2214828092. The cubic root of 6444432289 is about 1860.9222205339.

The spelling of 6444432289 in words is "six billion, four hundred forty-four million, four hundred thirty-two thousand, two hundred eighty-nine".