681944322 has 16 divisors (see below), whose sum is σ = 1389623040. Its totient is φ = 223025712.

The previous prime is 681944311. The next prime is 681944339. The reversal of 681944322 is 223449186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071922 + ... + 1072557.

It is an arithmetic number, because the mean of its divisors is an integer number (86851440).

Almost surely, 2^681944322 is an apocalyptic number.

681944322 is an abundant number, since it is smaller than the sum of its proper divisors (707678718).

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

681944322 is a wasteful number, since it uses less digits than its factorization.

681944322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144537.

The product of its digits is 82944, while the sum is 39.

The square root of 681944322 is about 26114.0636822384. The cubic root of 681944322 is about 880.2032596941.

The spelling of 681944322 in words is "six hundred eighty-one million, nine hundred forty-four thousand, three hundred twenty-two".