6443662663446 has 32 divisors (see below), whose sum is σ = 13236182107488. Its totient is φ = 2089749588480.

The previous prime is 6443662663429. The next prime is 6443662663447.

It is a happy number.

6443662663446 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6443662663446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443662663447) 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, 4854766 + ... + 6037886.

It is an arithmetic number, because the mean of its divisors is an integer number (413630690859).

Almost surely, 2^{6443662663446} is an apocalyptic number.

6443662663446 is an abundant number, since it is smaller than the sum of its proper divisors (6792519444042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6443662663446 is a wasteful number, since it uses less digits than its factorization.

6443662663446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207696.

The product of its digits is 214990848, while the sum is 60.

The spelling of 6443662663446 in words is "six trillion, four hundred forty-three billion, six hundred sixty-two million, six hundred sixty-three thousand, four hundred forty-six".