6544143421 has 8 divisors (see below), whose sum is σ = 6965374464. Its totient is φ = 6126943680.

The previous prime is 6544143407. The next prime is 6544143439. The reversal of 6544143421 is 1243414456.

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

It is a cyclic number.

It is not a de Polignac number, because 6544143421 - 2⁹ = 6544142909 is a prime.

It is a super-2 number, since 2×6544143421² = 85651626229235166482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544143821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004475 + ... + 1010968.

It is an arithmetic number, because the mean of its divisors is an integer number (870671808).

Almost surely, 2^6544143421 is an apocalyptic number.

It is an amenable number.

6544143421 is a deficient number, since it is larger than the sum of its proper divisors (421231043).

6544143421 is a wasteful number, since it uses less digits than its factorization.

6544143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015651.

The product of its digits is 46080, while the sum is 34.

The square root of 6544143421 is about 80895.8801237739. The cubic root of 6544143421 is about 1870.4708148499.

Adding to 6544143421 its reverse (1243414456), we get a palindrome (7787557877).

The spelling of 6544143421 in words is "six billion, five hundred forty-four million, one hundred forty-three thousand, four hundred twenty-one".