681582977320 has 192 divisors, whose sum is σ = 1878816124800. Its totient is φ = 221270192640.

The previous prime is 681582977311. The next prime is 681582977333. The reversal of 681582977320 is 23779285186.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 97602549 + ... + 97609531.

It is an arithmetic number, because the mean of its divisors is an integer number (9785500650).

Almost surely, 2^681582977320 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 681582977320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939408062400).

681582977320 is an abundant number, since it is smaller than the sum of its proper divisors (1197233147480).

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

681582977320 is a wasteful number, since it uses less digits than its factorization.

681582977320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648 (or 9637 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 681582977320 in words is "six hundred eighty-one billion, five hundred eighty-two million, nine hundred seventy-seven thousand, three hundred twenty".