168518685017 has 8 divisors (see below), whose sum is σ = 169120149576. Its totient is φ = 167918199552.

The previous prime is 168518685011. The next prime is 168518685029. The reversal of 168518685017 is 710586815861.

It can be written as a sum of positive squares in 4 ways, for example, as 5634604096 + 162884080921 = 75064^2 + 403589^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 168518685017 - 2⁶ = 168518684953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168518685011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100943 + ... + 589259.

It is an arithmetic number, because the mean of its divisors is an integer number (21140018697).

Almost surely, 2^168518685017 is an apocalyptic number.

It is an amenable number.

168518685017 is a deficient number, since it is larger than the sum of its proper divisors (601464559).

168518685017 is an equidigital number, since it uses as much as digits as its factorization.

168518685017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489547.

The product of its (nonzero) digits is 3225600, while the sum is 56.

The spelling of 168518685017 in words is "one hundred sixty-eight billion, five hundred eighteen million, six hundred eighty-five thousand, seventeen".