6443644463446 has 4 divisors (see below), whose sum is σ = 9665466695172. Its totient is φ = 3221822231722.

The previous prime is 6443644463371. The next prime is 6443644463507.

6443644463446 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610911115860 + ... + 1610911115863.

It is an arithmetic number, because the mean of its divisors is an integer number (2416366673793).

Almost surely, 2^{6443644463446} is an apocalyptic number.

6443644463446 is a deficient number, since it is larger than the sum of its proper divisors (3221822231726).

6443644463446 is a wasteful number, since it uses less digits than its factorization.

6443644463446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221822231725.

The product of its digits is 191102976, while the sum is 58.

The spelling of 6443644463446 in words is "six trillion, four hundred forty-three billion, six hundred forty-four million, four hundred sixty-three thousand, four hundred forty-six".