681546808 has 16 divisors (see below), whose sum is σ = 1312438680. Its totient is φ = 331563168.

The previous prime is 681546799. The next prime is 681546809. The reversal of 681546808 is 808645186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681546809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150966 + ... + 1151557.

Almost surely, 2^681546808 is an apocalyptic number.

It is an amenable number.

681546808 is a deficient number, since it is larger than the sum of its proper divisors (630891872).

681546808 is a wasteful number, since it uses less digits than its factorization.

681546808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302566 (or 2302562 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 681546808 is about 26106.4514631920. The cubic root of 681546808 is about 880.0321992350.

The spelling of 681546808 in words is "six hundred eighty-one million, five hundred forty-six thousand, eight hundred eight".