168845417817 has 32 divisors (see below), whose sum is σ = 243118643328. Its totient is φ = 103849537536.

The previous prime is 168845417791. The next prime is 168845417857. The reversal of 168845417817 is 718714548861.

It is a happy number.

It is not a de Polignac number, because 168845417817 - 2¹¹ = 168845415769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168845417857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467733 + ... + 745965.

It is an arithmetic number, because the mean of its divisors is an integer number (7597457604).

Almost surely, 2^168845417817 is an apocalyptic number.

168845417817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

168845417817 is a deficient number, since it is larger than the sum of its proper divisors (74273225511).

168845417817 is a wasteful number, since it uses less digits than its factorization.

168845417817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278489.

The product of its digits is 12042240, while the sum is 60.

The spelling of 168845417817 in words is "one hundred sixty-eight billion, eight hundred forty-five million, four hundred seventeen thousand, eight hundred seventeen".