9856643701 has 2 divisors, whose sum is σ = 9856643702. Its totient is φ = 9856643700.

The previous prime is 9856643689. The next prime is 9856643711. The reversal of 9856643701 is 1073466589.

9856643701 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8366760900 + 1489882801 = 91470^2 + 38599^2 .

It is a cyclic number.

It is not a de Polignac number, because 9856643701 - 2⁹ = 9856643189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9856643711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4928321850 + 4928321851.

It is an arithmetic number, because the mean of its divisors is an integer number (4928321851).

Almost surely, 2^9856643701 is an apocalyptic number.

It is an amenable number.

9856643701 is a deficient number, since it is larger than the sum of its proper divisors (1).

9856643701 is an equidigital number, since it uses as much as digits as its factorization.

9856643701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 9856643701 is about 99280.6310465440. The cubic root of 9856643701 is about 2144.0900396030.

The spelling of 9856643701 in words is "nine billion, eight hundred fifty-six million, six hundred forty-three thousand, seven hundred one".