85911391139 has 4 divisors (see below), whose sum is σ = 98184447024. Its totient is φ = 73638335256.

The previous prime is 85911391117. The next prime is 85911391157. The reversal of 85911391139 is 93119311958.

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 85911391139 - 2⁸ = 85911390883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85911391339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6136527932 + ... + 6136527945.

It is an arithmetic number, because the mean of its divisors is an integer number (24546111756).

Almost surely, 2^85911391139 is an apocalyptic number.

85911391139 is a deficient number, since it is larger than the sum of its proper divisors (12273055885).

85911391139 is a wasteful number, since it uses less digits than its factorization.

85911391139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12273055884.

The product of its digits is 262440, while the sum is 50.

The spelling of 85911391139 in words is "eighty-five billion, nine hundred eleven million, three hundred ninety-one thousand, one hundred thirty-nine".