681838223584 has 96 divisors (see below), whose sum is σ = 1544950955520. Its totient is φ = 290160686592.

The previous prime is 681838223569. The next prime is 681838223639. The reversal of 681838223584 is 485322838186.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31882207 + ... + 31903585.

It is an arithmetic number, because the mean of its divisors is an integer number (16093239120).

Almost surely, 2^681838223584 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681838223584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772475477760).

681838223584 is an abundant number, since it is smaller than the sum of its proper divisors (863112731936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681838223584 is a wasteful number, since it uses less digits than its factorization.

681838223584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22392 (or 22384 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 58.

The spelling of 681838223584 in words is "six hundred eighty-one billion, eight hundred thirty-eight million, two hundred twenty-three thousand, five hundred eighty-four".