681633200 has 120 divisors (see below), whose sum is σ = 1700047440. Its totient is φ = 262451200.

The previous prime is 681633187. The next prime is 681633209. The reversal of 681633200 is 2336186.

It is not an unprimeable number, because it can be changed into a prime (681633209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1459367 + ... + 1459833.

It is an arithmetic number, because the mean of its divisors is an integer number (14167062).

Almost surely, 2^681633200 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 681633200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850023720).

681633200 is an abundant number, since it is smaller than the sum of its proper divisors (1018414240).

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

681633200 is a wasteful number, since it uses less digits than its factorization.

681633200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 681633200 is about 26108.1060209277. The cubic root of 681633200 is about 880.0693815820.

Adding to 681633200 its reverse (2336186), we get a palindrome (683969386).

The spelling of 681633200 in words is "six hundred eighty-one million, six hundred thirty-three thousand, two hundred".