85856791191 has 8 divisors (see below), whose sum is σ = 114747637104. Its totient is φ = 57101903040.

The previous prime is 85856791187. The next prime is 85856791201. The reversal of 85856791191 is 19119765858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85856791191 - 2² = 85856791187 is a prime.

It is a super-2 number, since 2×85856791191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85856391191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33987966 + ... + 33990491.

It is an arithmetic number, because the mean of its divisors is an integer number (14343454638).

Almost surely, 2^85856791191 is an apocalyptic number.

85856791191 is a deficient number, since it is larger than the sum of its proper divisors (28890845913).

85856791191 is a wasteful number, since it uses less digits than its factorization.

85856791191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67978881.

The product of its digits is 5443200, while the sum is 60.

The spelling of 85856791191 in words is "eighty-five billion, eight hundred fifty-six million, seven hundred ninety-one thousand, one hundred ninety-one".