681028522320 has 320 divisors, whose sum is σ = 2193378186240. Its totient is φ = 174688763904.

The previous prime is 681028522309. The next prime is 681028522327. The reversal of 681028522320 is 23225820186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681028522327) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 261029176 + ... + 261031784.

It is an arithmetic number, because the mean of its divisors is an integer number (6854306832).

Almost surely, 2^681028522320 is an apocalyptic number.

681028522320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681028522320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1096689093120).

681028522320 is an abundant number, since it is smaller than the sum of its proper divisors (1512349663920).

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

681028522320 is a wasteful number, since it uses less digits than its factorization.

681028522320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062 (or 3056 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 681028522320 in words is "six hundred eighty-one billion, twenty-eight million, five hundred twenty-two thousand, three hundred twenty".