6437641663 has 2 divisors, whose sum is σ = 6437641664. Its totient is φ = 6437641662.

The previous prime is 6437641633. The next prime is 6437641667. The reversal of 6437641663 is 3661467346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6437641663 - 2⁵ = 6437641631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6437641667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218820831 + 3218820832.

It is an arithmetic number, because the mean of its divisors is an integer number (3218820832).

Almost surely, 2^6437641663 is an apocalyptic number.

6437641663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6437641663 is an equidigital number, since it uses as much as digits as its factorization.

6437641663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 46.

The square root of 6437641663 is about 80234.9154857161. The cubic root of 6437641663 is about 1860.2683606124.

The spelling of 6437641663 in words is "six billion, four hundred thirty-seven million, six hundred forty-one thousand, six hundred sixty-three".