6441221447 has 8 divisors (see below), whose sum is σ = 6652851840. Its totient is φ = 6229831680.

The previous prime is 6441221441. The next prime is 6441221467. The reversal of 6441221447 is 7441221446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6441221447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441221441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4922 + ... + 113607.

It is an arithmetic number, because the mean of its divisors is an integer number (831606480).

Almost surely, 2^6441221447 is an apocalyptic number.

6441221447 is a deficient number, since it is larger than the sum of its proper divisors (211630393).

6441221447 is a wasteful number, since it uses less digits than its factorization.

6441221447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120313.

The product of its digits is 43008, while the sum is 35.

The square root of 6441221447 is about 80257.2205287474. The cubic root of 6441221447 is about 1860.6131103041.

Subtracting 6441221447 from its reverse (7441221446), we obtain a palindrome (999999999).

The spelling of 6441221447 in words is "six billion, four hundred forty-one million, two hundred twenty-one thousand, four hundred forty-seven".