840844682231 has 4 divisors (see below), whose sum is σ = 841129427712. Its totient is φ = 840559936752.

The previous prime is 840844682221. The next prime is 840844682243. The reversal of 840844682231 is 132286448048.

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 840844682231 - 2³⁸ = 565966775287 is a prime.

It is a super-2 number, since 2×840844682231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840844682231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840844682221) 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, 142368311 + ... + 142374216.

It is an arithmetic number, because the mean of its divisors is an integer number (210282356928).

Almost surely, 2^840844682231 is an apocalyptic number.

840844682231 is a deficient number, since it is larger than the sum of its proper divisors (284745481).

840844682231 is a wasteful number, since it uses less digits than its factorization.

840844682231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284745480.

The product of its (nonzero) digits is 2359296, while the sum is 50.

The spelling of 840844682231 in words is "eight hundred forty billion, eight hundred forty-four million, six hundred eighty-two thousand, two hundred thirty-one".