681308080 has 120 divisors (see below), whose sum is σ = 1727996544. Its totient is φ = 249523200.

The previous prime is 681308071. The next prime is 681308123. The reversal of 681308080 is 80803186.

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 23 ways as a sum of consecutive naturals, for example, 894900 + ... + 895660.

Almost surely, 2^681308080 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 681308080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863998272).

681308080 is an abundant number, since it is smaller than the sum of its proper divisors (1046688464).

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

681308080 is a wasteful number, since it uses less digits than its factorization.

681308080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 681308080 is about 26101.8788595764. The cubic root of 681308080 is about 879.9294364907.

The spelling of 681308080 in words is "six hundred eighty-one million, three hundred eight thousand, eighty".