6463443646 has 16 divisors (see below), whose sum is σ = 10607940720. Its totient is φ = 2929207680.

The previous prime is 6463443631. The next prime is 6463443709.

It is a happy number.

6463443646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6463443646² = 83552207530035546632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6463443596 and 6463443605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428481 + ... + 443308.

It is an arithmetic number, because the mean of its divisors is an integer number (662996295).

Almost surely, 2^6463443646 is an apocalyptic number.

6463443646 is a deficient number, since it is larger than the sum of its proper divisors (4144497074).

6463443646 is a wasteful number, since it uses less digits than its factorization.

6463443646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872139.

The product of its digits is 2985984, while the sum is 46.

The square root of 6463443646 is about 80395.5449387589. The cubic root of 6463443646 is about 1862.7503579853.

The spelling of 6463443646 in words is "six billion, four hundred sixty-three million, four hundred forty-three thousand, six hundred forty-six".