8663841285109 has 2 divisors, whose sum is σ = 8663841285110. Its totient is φ = 8663841285108.

The previous prime is 8663841285091. The next prime is 8663841285137. The reversal of 8663841285109 is 9015821483668.

Together with previous prime (8663841285091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8606138038884 + 57703246225 = 2933622^2 + 240215^2 .

It is a cyclic number.

It is not a de Polignac number, because 8663841285109 - 2³¹ = 8661693801461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8663841285149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4331920642554 + 4331920642555.

It is an arithmetic number, because the mean of its divisors is an integer number (4331920642555).

Almost surely, 2^{8663841285109} is an apocalyptic number.

It is an amenable number.

8663841285109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8663841285109 is an equidigital number, since it uses as much as digits as its factorization.

8663841285109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19906560, while the sum is 61.

The spelling of 8663841285109 in words is "eight trillion, six hundred sixty-three billion, eight hundred forty-one million, two hundred eighty-five thousand, one hundred nine".