6543730321 has 8 divisors (see below), whose sum is σ = 7293322080. Its totient is φ = 5834657088.

The previous prime is 6543730313. The next prime is 6543730331. The reversal of 6543730321 is 1230373456.

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 6543730321 - 2³ = 6543730313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6543730331) 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 7 ways as a sum of consecutive naturals, for example, 10129291 + ... + 10129936.

It is an arithmetic number, because the mean of its divisors is an integer number (911665260).

Almost surely, 2^6543730321 is an apocalyptic number.

It is an amenable number.

6543730321 is a deficient number, since it is larger than the sum of its proper divisors (749591759).

6543730321 is a wasteful number, since it uses less digits than its factorization.

6543730321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20259263.

The product of its (nonzero) digits is 45360, while the sum is 34.

The square root of 6543730321 is about 80893.3268014117. The cubic root of 6543730321 is about 1870.4314561081.

The spelling of 6543730321 in words is "six billion, five hundred forty-three million, seven hundred thirty thousand, three hundred twenty-one".