681171712 has 36 divisors (see below), whose sum is σ = 1464280720. Its totient is φ = 314385408.

The previous prime is 681171677. The next prime is 681171713. The reversal of 681171712 is 217171186.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (681171713) 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, 99012 + ... + 105667.

Almost surely, 2^681171712 is an apocalyptic number.

It is an amenable number.

681171712 is an abundant number, since it is smaller than the sum of its proper divisors (783109008).

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

681171712 is a wasteful number, since it uses less digits than its factorization.

681171712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204708 (or 204694 counting only the distinct ones).

The product of its digits is 4704, while the sum is 34.

The square root of 681171712 is about 26099.2665031031. The cubic root of 681171712 is about 879.8707248116.

The spelling of 681171712 in words is "six hundred eighty-one million, one hundred seventy-one thousand, seven hundred twelve".