681804736 has 14 divisors (see below), whose sum is σ = 1352956400. Its totient is φ = 340902336.

The previous prime is 681804733. The next prime is 681804751. The reversal of 681804736 is 637408186.

It is a junction number, because it is equal to n+sod(n) for n = 681804692 and 681804701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681804733) 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 as a sum of consecutive naturals, namely, 5326536 + ... + 5326663.

Almost surely, 2^681804736 is an apocalyptic number.

It is an amenable number.

681804736 is a deficient number, since it is larger than the sum of its proper divisors (671151664).

681804736 is a wasteful number, since it uses less digits than its factorization.

681804736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10653211 (or 10653201 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 681804736 is about 26111.3909242690. The cubic root of 681804736 is about 880.1431998367.

The spelling of 681804736 in words is "six hundred eighty-one million, eight hundred four thousand, seven hundred thirty-six".