85807866018317 has 4 divisors (see below), whose sum is σ = 86983316237820. Its totient is φ = 84632415798816.

The previous prime is 85807866018311. The next prime is 85807866018323. The reversal of 85807866018317 is 71381066870858.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (85807866018311) and next prime (85807866018323).

It can be written as a sum of positive squares in 2 ways, for example, as 48071675023876 + 37736190994441 = 6933374^2 + 6142979^2 .

It is a cyclic number.

It is not a de Polignac number, because 85807866018317 - 2³⁰ = 85806792276493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85807866018311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587725109642 + ... + 587725109787.

It is an arithmetic number, because the mean of its divisors is an integer number (21745829059455).

Almost surely, 2^{85807866018317} is an apocalyptic number.

It is an amenable number.

85807866018317 is a deficient number, since it is larger than the sum of its proper divisors (1175450219503).

85807866018317 is a wasteful number, since it uses less digits than its factorization.

85807866018317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175450219502.

The product of its (nonzero) digits is 108380160, while the sum is 68.

The spelling of 85807866018317 in words is "eighty-five trillion, eight hundred seven billion, eight hundred sixty-six million, eighteen thousand, three hundred seventeen".