6438001380663 has 16 divisors (see below), whose sum is σ = 8821986293120. Its totient is φ = 4173880433184.

The previous prime is 6438001380637. The next prime is 6438001380709. The reversal of 6438001380663 is 3660831008346.

It is a happy number.

It is not a de Polignac number, because 6438001380663 - 2⁵ = 6438001380631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438001380623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108937681 + ... + 108996762.

It is an arithmetic number, because the mean of its divisors is an integer number (551374143320).

Almost surely, 2^{6438001380663} is an apocalyptic number.

6438001380663 is a deficient number, since it is larger than the sum of its proper divisors (2383984912457).

6438001380663 is a wasteful number, since it uses less digits than its factorization.

6438001380663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217934718.

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 6438001380663 in words is "six trillion, four hundred thirty-eight billion, one million, three hundred eighty thousand, six hundred sixty-three".