681358612 has 24 divisors (see below), whose sum is σ = 1302396480. Its totient is φ = 309322560.

The previous prime is 681358603. The next prime is 681358631. The reversal of 681358612 is 216853186.

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, 27688 + ... + 46144.

It is an arithmetic number, because the mean of its divisors is an integer number (54266520).

Almost surely, 2^681358612 is an apocalyptic number.

It is an amenable number.

681358612 is a deficient number, since it is larger than the sum of its proper divisors (621037868).

681358612 is a wasteful number, since it uses less digits than its factorization.

681358612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19311 (or 19309 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 681358612 is about 26102.8468179239. The cubic root of 681358612 is about 879.9511904746.

The spelling of 681358612 in words is "six hundred eighty-one million, three hundred fifty-eight thousand, six hundred twelve".