6543984259 has 2 divisors, whose sum is σ = 6543984260. Its totient is φ = 6543984258.

The previous prime is 6543984221. The next prime is 6543984263. The reversal of 6543984259 is 9524893456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6543984259 - 2¹⁷ = 6543853187 is a prime.

It is not a weakly prime, because it can be changed into another prime (6543984289) 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 as a sum of consecutive naturals, namely, 3271992129 + 3271992130.

It is an arithmetic number, because the mean of its divisors is an integer number (3271992130).

Almost surely, 2^6543984259 is an apocalyptic number.

6543984259 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543984259 is an equidigital number, since it uses as much as digits as its factorization.

6543984259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9331200, while the sum is 55.

The square root of 6543984259 is about 80894.8963717737. The cubic root of 6543984259 is about 1870.4556506402.

The spelling of 6543984259 in words is "six billion, five hundred forty-three million, nine hundred eighty-four thousand, two hundred fifty-nine".