681802118 has 8 divisors (see below), whose sum is σ = 1076529720. Its totient is φ = 322958880.

The previous prime is 681802091. The next prime is 681802129. The reversal of 681802118 is 811208186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8971043 + ... + 8971118.

It is an arithmetic number, because the mean of its divisors is an integer number (134566215).

Almost surely, 2^681802118 is an apocalyptic number.

681802118 is a deficient number, since it is larger than the sum of its proper divisors (394727602).

681802118 is a wasteful number, since it uses less digits than its factorization.

681802118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17942182.

The product of its (nonzero) digits is 6144, while the sum is 35.

The square root of 681802118 is about 26111.3407928433. The cubic root of 681802118 is about 880.1420733080.

The spelling of 681802118 in words is "six hundred eighty-one million, eight hundred two thousand, one hundred eighteen".