681322752 has 360 divisors, whose sum is σ = 2314952640. Its totient is φ = 197406720.

The previous prime is 681322751. The next prime is 681322823. The reversal of 681322752 is 257223186.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681322751) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6614733 + ... + 6614835.

It is an arithmetic number, because the mean of its divisors is an integer number (6430424).

Almost surely, 2^681322752 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 681322752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157476320).

681322752 is an abundant number, since it is smaller than the sum of its proper divisors (1633629888).

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

681322752 is a wasteful number, since it uses less digits than its factorization.

681322752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 148 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 681322752 is about 26102.1599106281. The cubic root of 681322752 is about 879.9357528853.

The spelling of 681322752 in words is "six hundred eighty-one million, three hundred twenty-two thousand, seven hundred fifty-two".