6549969843 has 6 divisors (see below), whose sum is σ = 9461067564. Its totient is φ = 4366646556.

The previous prime is 6549969809. The next prime is 6549969851. The reversal of 6549969843 is 3489699456.

6549969843 is a `hidden beast` number, since 6 + 5 + 499 + 69 + 84 + 3 = 666.

It is not a de Polignac number, because 6549969843 - 2³⁰ = 5476228019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6549969443) 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 5 ways as a sum of consecutive naturals, for example, 363887205 + ... + 363887222.

It is an arithmetic number, because the mean of its divisors is an integer number (1576844594).

Almost surely, 2^6549969843 is an apocalyptic number.

6549969843 is a deficient number, since it is larger than the sum of its proper divisors (2911097721).

6549969843 is a wasteful number, since it uses less digits than its factorization.

6549969843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727774433 (or 727774430 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 63.

The square root of 6549969843 is about 80931.8839704106. The cubic root of 6549969843 is about 1871.0257598799.

The spelling of 6549969843 in words is "six billion, five hundred forty-nine million, nine hundred sixty-nine thousand, eight hundred forty-three".