85811238865193 has 2 divisors, whose sum is σ = 85811238865194. Its totient is φ = 85811238865192.

The previous prime is 85811238865123. The next prime is 85811238865207. The reversal of 85811238865193 is 39156883211858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79914874798144 + 5896364067049 = 8939512^2 + 2428243^2 .

It is a cyclic number.

It is not a de Polignac number, because 85811238865193 - 2⁸ = 85811238864937 is a prime.

It is not a weakly prime, because it can be changed into another prime (85811238865123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42905619432596 + 42905619432597.

It is an arithmetic number, because the mean of its divisors is an integer number (42905619432597).

Almost surely, 2^{85811238865193} is an apocalyptic number.

It is an amenable number.

85811238865193 is a deficient number, since it is larger than the sum of its proper divisors (1).

85811238865193 is an equidigital number, since it uses as much as digits as its factorization.

85811238865193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99532800, while the sum is 68.

The spelling of 85811238865193 in words is "eighty-five trillion, eight hundred eleven billion, two hundred thirty-eight million, eight hundred sixty-five thousand, one hundred ninety-three".