85771471867 has 16 divisors (see below), whose sum is σ = 95269824000. Its totient is φ = 76850921664.

The previous prime is 85771471861. The next prime is 85771471871. The reversal of 85771471867 is 76817417758.

It is a cyclic number.

It is not a de Polignac number, because 85771471867 - 2³¹ = 83623988219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85771471861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063767 + ... + 1141552.

It is an arithmetic number, because the mean of its divisors is an integer number (5954364000).

Almost surely, 2^85771471867 is an apocalyptic number.

85771471867 is a deficient number, since it is larger than the sum of its proper divisors (9498352133).

85771471867 is a wasteful number, since it uses less digits than its factorization.

85771471867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205450.

The product of its digits is 18439680, while the sum is 61.

The spelling of 85771471867 in words is "eighty-five billion, seven hundred seventy-one million, four hundred seventy-one thousand, eight hundred sixty-seven".