6438241009 has 2 divisors, whose sum is σ = 6438241010. Its totient is φ = 6438241008.

The previous prime is 6438241001. The next prime is 6438241049. The reversal of 6438241009 is 9001428346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5444226225 + 994014784 = 73785^2 + 31528^2 .

It is a cyclic number.

It is not a de Polignac number, because 6438241009 - 2³ = 6438241001 is a prime.

It is not a weakly prime, because it can be changed into another prime (6438241001) 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, 3219120504 + 3219120505.

It is an arithmetic number, because the mean of its divisors is an integer number (3219120505).

Almost surely, 2^6438241009 is an apocalyptic number.

It is an amenable number.

6438241009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438241009 is an equidigital number, since it uses as much as digits as its factorization.

6438241009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6438241009 is about 80238.6503438337. The cubic root of 6438241009 is about 1860.3260892994.

The spelling of 6438241009 in words is "six billion, four hundred thirty-eight million, two hundred forty-one thousand, nine".