6440845007 has 2 divisors, whose sum is σ = 6440845008. Its totient is φ = 6440845006.

The previous prime is 6440845001. The next prime is 6440845009. The reversal of 6440845007 is 7005480446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6440845007 - 2¹⁴ = 6440828623 is a prime.

Together with 6440845009, 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 (6440845001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220422503 + 3220422504.

It is an arithmetic number, because the mean of its divisors is an integer number (3220422504).

Almost surely, 2^6440845007 is an apocalyptic number.

6440845007 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440845007 is an equidigital number, since it uses as much as digits as its factorization.

6440845007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 6440845007 is about 80254.8752849321. The cubic root of 6440845007 is about 1860.5768634085.

The spelling of 6440845007 in words is "six billion, four hundred forty million, eight hundred forty-five thousand, seven".