681755684 has 12 divisors (see below), whose sum is σ = 1193900400. Its totient is φ = 340641288.

The previous prime is 681755681. The next prime is 681755699. The reversal of 681755684 is 486557186.

It is not an unprimeable number, because it can be changed into a prime (681755681) 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, 52574 + ... + 64245.

It is an arithmetic number, because the mean of its divisors is an integer number (99491700).

Almost surely, 2^681755684 is an apocalyptic number.

It is an amenable number.

681755684 is a deficient number, since it is larger than the sum of its proper divisors (512144716).

681755684 is a wasteful number, since it uses less digits than its factorization.

681755684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118282 (or 118280 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The square root of 681755684 is about 26110.4516238230. The cubic root of 681755684 is about 880.1220922198.

The spelling of 681755684 in words is "six hundred eighty-one million, seven hundred fifty-five thousand, six hundred eighty-four".