681600210 has 64 divisors (see below), whose sum is σ = 1736163072. Its totient is φ = 170663936.

The previous prime is 681600203. The next prime is 681600211. The reversal of 681600210 is 12006186.

It is not an unprimeable number, because it can be changed into a prime (681600211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255202 + ... + 257858.

It is an arithmetic number, because the mean of its divisors is an integer number (27127548).

Almost surely, 2^681600210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681600210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868081536).

681600210 is an abundant number, since it is smaller than the sum of its proper divisors (1054562862).

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

681600210 is a wasteful number, since it uses less digits than its factorization.

681600210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 681600210 is about 26107.4742171662. The cubic root of 681600210 is about 880.0551833508.

Adding to 681600210 its reverse (12006186), we get a palindrome (693606396).

The spelling of 681600210 in words is "six hundred eighty-one million, six hundred thousand, two hundred ten".