85867708164391 has 4 divisors (see below), whose sum is σ = 85898898762192. Its totient is φ = 85836517566592.

The previous prime is 85867708164379. The next prime is 85867708164419. The reversal of 85867708164391 is 19346180776858.

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

It is a cyclic number.

It is not a de Polignac number, because 85867708164391 - 2¹⁹ = 85867707640103 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 (85867708164341) 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, 15595294771 + ... + 15595300276.

It is an arithmetic number, because the mean of its divisors is an integer number (21474724690548).

Almost surely, 2^{85867708164391} is an apocalyptic number.

85867708164391 is a deficient number, since it is larger than the sum of its proper divisors (31190597801).

85867708164391 is a wasteful number, since it uses less digits than its factorization.

85867708164391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31190597800.

The product of its (nonzero) digits is 487710720, while the sum is 73.

The spelling of 85867708164391 in words is "eighty-five trillion, eight hundred sixty-seven billion, seven hundred eight million, one hundred sixty-four thousand, three hundred ninety-one".