865809226893253 has 2 divisors, whose sum is σ = 865809226893254. Its totient is φ = 865809226893252.

The previous prime is 865809226893209. The next prime is 865809226893293. The reversal of 865809226893253 is 352398622908568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832215066067044 + 33594160826209 = 28848138^2 + 5796047^2 .

It is a cyclic number.

It is not a de Polignac number, because 865809226893253 - 2²¹ = 865809224796101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 865809226893253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865809226893293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432904613446626 + 432904613446627.

It is an arithmetic number, because the mean of its divisors is an integer number (432904613446627).

Almost surely, 2^{865809226893253} is an apocalyptic number.

It is an amenable number.

865809226893253 is a deficient number, since it is larger than the sum of its proper divisors (1).

865809226893253 is an equidigital number, since it uses as much as digits as its factorization.

865809226893253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2687385600, while the sum is 76.

The spelling of 865809226893253 in words is "eight hundred sixty-five trillion, eight hundred nine billion, two hundred twenty-six million, eight hundred ninety-three thousand, two hundred fifty-three".