6544331441 has 4 divisors (see below), whose sum is σ = 6929292132. Its totient is φ = 6159370752.

The previous prime is 6544331413. The next prime is 6544331447. The reversal of 6544331441 is 1441334456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1876709041 + 4667622400 = 43321^2 + 68320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6544331441 is a prime.

It is a super-2 number, since 2×6544331441² = 85656548019322272962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6544331447) 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 3 ways as a sum of consecutive naturals, for example, 192480320 + ... + 192480353.

It is an arithmetic number, because the mean of its divisors is an integer number (1732323033).

Almost surely, 2^6544331441 is an apocalyptic number.

It is an amenable number.

6544331441 is a deficient number, since it is larger than the sum of its proper divisors (384960691).

6544331441 is a wasteful number, since it uses less digits than its factorization.

6544331441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384960690.

The product of its digits is 69120, while the sum is 35.

The square root of 6544331441 is about 80897.0422265240. The cubic root of 6544331441 is about 1870.4887281979.

Adding to 6544331441 its reverse (1441334456), we get a palindrome (7985665897).

The spelling of 6544331441 in words is "six billion, five hundred forty-four million, three hundred thirty-one thousand, four hundred forty-one".