681546732 has 48 divisors (see below), whose sum is σ = 1630497792. Its totient is φ = 221457600.

The previous prime is 681546727. The next prime is 681546737. The reversal of 681546732 is 237645186.

It is an interprime number because it is at equal distance from previous prime (681546727) and next prime (681546737).

It is not an unprimeable number, because it can be changed into a prime (681546737) 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 15 ways as a sum of consecutive naturals, for example, 348357 + ... + 350307.

It is an arithmetic number, because the mean of its divisors is an integer number (33968704).

Almost surely, 2^681546732 is an apocalyptic number.

It is an amenable number.

681546732 is an abundant number, since it is smaller than the sum of its proper divisors (948951060).

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

681546732 is a wasteful number, since it uses less digits than its factorization.

681546732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678 (or 2676 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 681546732 is about 26106.4500076131. The cubic root of 681546732 is about 880.0321665239.

The spelling of 681546732 in words is "six hundred eighty-one million, five hundred forty-six thousand, seven hundred thirty-two".