86185631771 has 4 divisors (see below), whose sum is σ = 87471984552. Its totient is φ = 84899278992.

The previous prime is 86185631759. The next prime is 86185631813. The reversal of 86185631771 is 17713658168.

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 86185631771 - 2²⁶ = 86118522907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86185631471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643176290 + ... + 643176423.

It is an arithmetic number, because the mean of its divisors is an integer number (21867996138).

Almost surely, 2^86185631771 is an apocalyptic number.

86185631771 is a deficient number, since it is larger than the sum of its proper divisors (1286352781).

86185631771 is a wasteful number, since it uses less digits than its factorization.

86185631771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286352780.

The product of its digits is 1693440, while the sum is 53.

The spelling of 86185631771 in words is "eighty-six billion, one hundred eighty-five million, six hundred thirty-one thousand, seven hundred seventy-one".