681168365 has 8 divisors (see below), whose sum is σ = 818304768. Its totient is φ = 544332880.

The previous prime is 681168337. The next prime is 681168413. The reversal of 681168365 is 563861186.

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

It is not a de Polignac number, because 681168365 - 2⁸ = 681168109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70217 + ... + 79326.

It is an arithmetic number, because the mean of its divisors is an integer number (102288096).

Almost surely, 2^681168365 is an apocalyptic number.

It is an amenable number.

681168365 is a deficient number, since it is larger than the sum of its proper divisors (137136403).

681168365 is a wasteful number, since it uses less digits than its factorization.

681168365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150459.

The product of its digits is 207360, while the sum is 44.

The square root of 681168365 is about 26099.2023824484. The cubic root of 681168365 is about 879.8692837006.

The spelling of 681168365 in words is "six hundred eighty-one million, one hundred sixty-eight thousand, three hundred sixty-five".