6543353849 has 2 divisors, whose sum is σ = 6543353850. Its totient is φ = 6543353848.

The previous prime is 6543353833. The next prime is 6543353867. The reversal of 6543353849 is 9483533456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3627893824 + 2915460025 = 60232^2 + 53995^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543353849 - 2⁴ = 6543353833 is a prime.

It is a super-2 number, since 2×6543353849² = 85630959186446229602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6543353797 and 6543353806.

It is not a weakly prime, because it can be changed into another prime (6543353809) 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 as a sum of consecutive naturals, namely, 3271676924 + 3271676925.

It is an arithmetic number, because the mean of its divisors is an integer number (3271676925).

Almost surely, 2^6543353849 is an apocalyptic number.

It is an amenable number.

6543353849 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543353849 is an equidigital number, since it uses as much as digits as its factorization.

6543353849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 50.

The square root of 6543353849 is about 80890.9998022030. Note that the first 3 decimals coincide. The cubic root of 6543353849 is about 1870.3955857131.

The spelling of 6543353849 in words is "six billion, five hundred forty-three million, three hundred fifty-three thousand, eight hundred forty-nine".