6441533121 has 32 divisors (see below), whose sum is σ = 9881395200. Its totient is φ = 3705488640.

The previous prime is 6441533117. The next prime is 6441533129. The reversal of 6441533121 is 1213351446.

It is not a de Polignac number, because 6441533121 - 2² = 6441533117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6441533129) 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 31 ways as a sum of consecutive naturals, for example, 77181 + ... + 137258.

It is an arithmetic number, because the mean of its divisors is an integer number (308793600).

Almost surely, 2^6441533121 is an apocalyptic number.

It is an amenable number.

6441533121 is a deficient number, since it is larger than the sum of its proper divisors (3439862079).

6441533121 is a wasteful number, since it uses less digits than its factorization.

6441533121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214509.

The product of its digits is 8640, while the sum is 30.

The square root of 6441533121 is about 80259.1622246333. The cubic root of 6441533121 is about 1860.6431199010.

Adding to 6441533121 its reverse (1213351446), we get a palindrome (7654884567).

The spelling of 6441533121 in words is "six billion, four hundred forty-one million, five hundred thirty-three thousand, one hundred twenty-one".