6446556446 has 12 divisors (see below), whose sum is σ = 10628826936. Its totient is φ = 2930252820.

The previous prime is 6446556443. The next prime is 6446556461.

6446556446 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6446556446² = 83116180022928301832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6446556394 and 6446556403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446556443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13319090 + ... + 13319573.

It is an arithmetic number, because the mean of its divisors is an integer number (885735578).

Almost surely, 2^6446556446 is an apocalyptic number.

6446556446 is a deficient number, since it is larger than the sum of its proper divisors (4182270490).

6446556446 is a wasteful number, since it uses less digits than its factorization.

6446556446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26638687 (or 26638676 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 50.

The square root of 6446556446 is about 80290.4505280672. The cubic root of 6446556446 is about 1861.1266583369.

The spelling of 6446556446 in words is "six billion, four hundred forty-six million, five hundred fifty-six thousand, four hundred forty-six".