85168644859 has 2 divisors, whose sum is σ = 85168644860. Its totient is φ = 85168644858.

The previous prime is 85168644797. The next prime is 85168644863. The reversal of 85168644859 is 95844686158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85168644859 - 2⁹ = 85168644347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85168644859.

It is not a weakly prime, because it can be changed into another prime (85168647859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42584322429 + 42584322430.

It is an arithmetic number, because the mean of its divisors is an integer number (42584322430).

Almost surely, 2^85168644859 is an apocalyptic number.

85168644859 is a deficient number, since it is larger than the sum of its proper divisors (1).

85168644859 is an equidigital number, since it uses as much as digits as its factorization.

85168644859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66355200, while the sum is 64.

The spelling of 85168644859 in words is "eighty-five billion, one hundred sixty-eight million, six hundred forty-four thousand, eight hundred fifty-nine".