6445445446 has 16 divisors (see below), whose sum is σ = 10548565200. Its totient is φ = 2929338880.

The previous prime is 6445445441. The next prime is 6445445471.

6445445446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6445445396 and 6445445405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445445441) by changing a digit.

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, 187830 + ... + 219478.

It is an arithmetic number, because the mean of its divisors is an integer number (659285325).

Almost surely, 2^6445445446 is an apocalyptic number.

6445445446 is a deficient number, since it is larger than the sum of its proper divisors (4103119754).

6445445446 is a wasteful number, since it uses less digits than its factorization.

6445445446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40919.

The product of its digits is 3686400, while the sum is 46.

The square root of 6445445446 is about 80283.5315989525. The cubic root of 6445445446 is about 1861.0197366271.

The spelling of 6445445446 in words is "six billion, four hundred forty-five million, four hundred forty-five thousand, four hundred forty-six".