6463663646 has 16 divisors (see below), whose sum is σ = 10588996080. Its totient is φ = 2934670080.

The previous prime is 6463663589. The next prime is 6463663693.

6463663646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6463663594 and 6463663603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148211 + ... + 186798.

It is an arithmetic number, because the mean of its divisors is an integer number (661812255).

Almost surely, 2^6463663646 is an apocalyptic number.

6463663646 is a deficient number, since it is larger than the sum of its proper divisors (4125332434).

6463663646 is a wasteful number, since it uses less digits than its factorization.

6463663646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335899.

The product of its digits is 6718464, while the sum is 50.

The square root of 6463663646 is about 80396.9131621358. The cubic root of 6463663646 is about 1862.7714922522.

The spelling of 6463663646 in words is "six billion, four hundred sixty-three million, six hundred sixty-three thousand, six hundred forty-six".