681668232200 has 108 divisors (see below), whose sum is σ = 1607369397165. Its totient is φ = 268851510720.

The previous prime is 681668232191. The next prime is 681668232229. The reversal of 681668232200 is 2232866186.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 668034867556 + 13633364644 = 817334^2 + 116762^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=583810.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 922419431 + ... + 922420169.

Almost surely, 2^681668232200 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 681668232200

681668232200 is an abundant number, since it is smaller than the sum of its proper divisors (925701164965).

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

681668232200 is an frugal number, since it uses more digits than its factorization.

681668232200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 681668232200 in words is "six hundred eighty-one billion, six hundred sixty-eight million, two hundred thirty-two thousand, two hundred".