6548639843 has 16 divisors (see below), whose sum is σ = 6945825600. Its totient is φ = 6163153920.

The previous prime is 6548639821. The next prime is 6548639849. The reversal of 6548639843 is 3489368456.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6548639843 - 2²⁴ = 6531862627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6548639849) 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 15 ways as a sum of consecutive naturals, for example, 2118443 + ... + 2121531.

It is an arithmetic number, because the mean of its divisors is an integer number (434114100).

Almost surely, 2^6548639843 is an apocalyptic number.

6548639843 is a deficient number, since it is larger than the sum of its proper divisors (397185757).

6548639843 is a wasteful number, since it uses less digits than its factorization.

6548639843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942.

The product of its digits is 14929920, while the sum is 56.

The square root of 6548639843 is about 80923.6667668983. Note that the first 3 decimals coincide. The cubic root of 6548639843 is about 1870.8991113217.

The spelling of 6548639843 in words is "six billion, five hundred forty-eight million, six hundred thirty-nine thousand, eight hundred forty-three".