6445445852 has 6 divisors (see below), whose sum is σ = 11279530248. Its totient is φ = 3222722924.

The previous prime is 6445445849. The next prime is 6445445857. The reversal of 6445445852 is 2585445446.

It is a junction number, because it is equal to n+sod(n) for n = 6445445797 and 6445445806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445445857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805680728 + ... + 805680735.

It is an arithmetic number, because the mean of its divisors is an integer number (1879921708).

Almost surely, 2^6445445852 is an apocalyptic number.

It is an amenable number.

6445445852 is a deficient number, since it is larger than the sum of its proper divisors (4834084396).

6445445852 is a wasteful number, since it uses less digits than its factorization.

6445445852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611361467 (or 1611361465 counting only the distinct ones).

The product of its digits is 3072000, while the sum is 47.

The square root of 6445445852 is about 80283.5341274909. The cubic root of 6445445852 is about 1861.0197757024.

The spelling of 6445445852 in words is "six billion, four hundred forty-five million, four hundred forty-five thousand, eight hundred fifty-two".