810544849 has 2 divisors, whose sum is σ = 810544850. Its totient is φ = 810544848.

The previous prime is 810544837. The next prime is 810544871. The reversal of 810544849 is 948445018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 567964224 + 242580625 = 23832^2 + 15575^2 .

It is a cyclic number.

It is not a de Polignac number, because 810544849 - 2⁹ = 810544337 is a prime.

It is not a weakly prime, because it can be changed into another prime (810544349) 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, 405272424 + 405272425.

It is an arithmetic number, because the mean of its divisors is an integer number (405272425).

Almost surely, 2^810544849 is an apocalyptic number.

It is an amenable number.

810544849 is a deficient number, since it is larger than the sum of its proper divisors (1).

810544849 is an equidigital number, since it uses as much as digits as its factorization.

810544849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 810544849 is about 28470.0693536212. The cubic root of 810544849 is about 932.3787138937.

The spelling of 810544849 in words is "eight hundred ten million, five hundred forty-four thousand, eight hundred forty-nine".