681831874584 has 480 divisors, whose sum is σ = 2348610580800. Its totient is φ = 184516315200.

The previous prime is 681831874547. The next prime is 681831874597. The reversal of 681831874584 is 485478138186.

It is a happy number.

681831874584 is a `hidden beast` number, since 6 + 8 + 18 + 31 + 8 + 7 + 4 + 584 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 146596659 + ... + 146601309.

It is an arithmetic number, because the mean of its divisors is an integer number (4892938710).

Almost surely, 2^681831874584 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 681831874584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174305290400).

681831874584 is an abundant number, since it is smaller than the sum of its proper divisors (1666778706216).

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

681831874584 is an equidigital number, since it uses as much as digits as its factorization.

681831874584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717 (or 4682 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 681831874584 in words is "six hundred eighty-one billion, eight hundred thirty-one million, eight hundred seventy-four thousand, five hundred eighty-four".