9805822261 has 2 divisors, whose sum is σ = 9805822262. Its totient is φ = 9805822260.

The previous prime is 9805822253. The next prime is 9805822289. The reversal of 9805822261 is 1622285089.

9805822261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9485591236 + 320231025 = 97394^2 + 17895^2 .

It is a cyclic number.

It is not a de Polignac number, because 9805822261 - 2³ = 9805822253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9805820261) 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, 4902911130 + 4902911131.

It is an arithmetic number, because the mean of its divisors is an integer number (4902911131).

Almost surely, 2^9805822261 is an apocalyptic number.

It is an amenable number.

9805822261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9805822261 is an equidigital number, since it uses as much as digits as its factorization.

9805822261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 9805822261 is about 99024.3518585201. The cubic root of 9805822261 is about 2140.3986695023.

The spelling of 9805822261 in words is "nine billion, eight hundred five million, eight hundred twenty-two thousand, two hundred sixty-one".