681856860 has 24 divisors (see below), whose sum is σ = 1909199376. Its totient is φ = 181828480.

The previous prime is 681856853. The next prime is 681856883. The reversal of 681856860 is 68658186.

It is a happy number.

681856860 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5682081 + ... + 5682200.

It is an arithmetic number, because the mean of its divisors is an integer number (79549974).

Almost surely, 2^681856860 is an apocalyptic number.

681856860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681856860 is an abundant number, since it is smaller than the sum of its proper divisors (1227342516).

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

681856860 is a wasteful number, since it uses less digits than its factorization.

681856860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11364293 (or 11364291 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 681856860 is about 26112.3890136464. The cubic root of 681856860 is about 880.1656282598.

The spelling of 681856860 in words is "six hundred eighty-one million, eight hundred fifty-six thousand, eight hundred sixty".