681598268 has 24 divisors (see below), whose sum is σ = 1315885200. Its totient is φ = 306910080.

The previous prime is 681598249. The next prime is 681598279. The reversal of 681598268 is 862895186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157718 + ... + 161981.

It is an arithmetic number, because the mean of its divisors is an integer number (54828550).

Almost surely, 2^681598268 is an apocalyptic number.

It is an amenable number.

681598268 is a deficient number, since it is larger than the sum of its proper divisors (634286932).

681598268 is a wasteful number, since it uses less digits than its factorization.

681598268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319757 (or 319755 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 53.

The square root of 681598268 is about 26107.4370247253. The cubic root of 681598268 is about 880.0543475388.

The spelling of 681598268 in words is "six hundred eighty-one million, five hundred ninety-eight thousand, two hundred sixty-eight".