681534808 has 8 divisors (see below), whose sum is σ = 1277877780. Its totient is φ = 340767400.

The previous prime is 681534797. The next prime is 681534809. The reversal of 681534808 is 808435186.

681534808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681534809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595918 + ... + 42595933.

Almost surely, 2^681534808 is an apocalyptic number.

It is an amenable number.

681534808 is a deficient number, since it is larger than the sum of its proper divisors (596342972).

681534808 is a wasteful number, since it uses less digits than its factorization.

681534808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85191857 (or 85191853 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 681534808 is about 26106.2216339324. The cubic root of 681534808 is about 880.0270342934.

The spelling of 681534808 in words is "six hundred eighty-one million, five hundred thirty-four thousand, eight hundred eight".