6441958709 has 2 divisors, whose sum is σ = 6441958710. Its totient is φ = 6441958708.

The previous prime is 6441958693. The next prime is 6441958711. The reversal of 6441958709 is 9078591446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6100078609 + 341880100 = 78103^2 + 18490^2 .

It is a cyclic number.

It is not a de Polignac number, because 6441958709 - 2⁴ = 6441958693 is a prime.

Together with 6441958711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6441958729) 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, 3220979354 + 3220979355.

It is an arithmetic number, because the mean of its divisors is an integer number (3220979355).

Almost surely, 2^6441958709 is an apocalyptic number.

It is an amenable number.

6441958709 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441958709 is an equidigital number, since it uses as much as digits as its factorization.

6441958709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 6441958709 is about 80261.8135167652. The cubic root of 6441958709 is about 1860.6840961681.

The spelling of 6441958709 in words is "six billion, four hundred forty-one million, nine hundred fifty-eight thousand, seven hundred nine".