831313887644 has 12 divisors (see below), whose sum is σ = 1488631845624. Its totient is φ = 405990503184.

The previous prime is 831313887643. The next prime is 831313887647. The reversal of 831313887644 is 446788313138.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 831313887644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831313887643) 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, 2416609967 + ... + 2416610310.

It is an arithmetic number, because the mean of its divisors is an integer number (124052653802).

Almost surely, 2^831313887644 is an apocalyptic number.

It is an amenable number.

831313887644 is a deficient number, since it is larger than the sum of its proper divisors (657317957980).

831313887644 is a wasteful number, since it uses less digits than its factorization.

831313887644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833220324 (or 4833220322 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 56.

The spelling of 831313887644 in words is "eight hundred thirty-one billion, three hundred thirteen million, eight hundred eighty-seven thousand, six hundred forty-four".