681835768 has 32 divisors (see below), whose sum is σ = 1323581760. Its totient is φ = 329080320.

The previous prime is 681835753. The next prime is 681835769. The reversal of 681835768 is 867538186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681835769) 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 7 ways as a sum of consecutive naturals, for example, 15028 + ... + 39868.

It is an arithmetic number, because the mean of its divisors is an integer number (41361930).

Almost surely, 2^681835768 is an apocalyptic number.

It is an amenable number.

681835768 is a deficient number, since it is larger than the sum of its proper divisors (641745992).

681835768 is a wasteful number, since it uses less digits than its factorization.

681835768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24967 (or 24963 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 681835768 is about 26111.9851409271. The cubic root of 681835768 is about 880.1565527260.

The spelling of 681835768 in words is "six hundred eighty-one million, eight hundred thirty-five thousand, seven hundred sixty-eight".