168485216817 has 4 divisors (see below), whose sum is σ = 224646955760. Its totient is φ = 112323477876.

The previous prime is 168485216813. The next prime is 168485216849. The reversal of 168485216817 is 718612584861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 168485216817 - 2² = 168485216813 is a prime.

It is a super-2 number, since 2×168485216817² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168485216813) 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, 28080869467 + ... + 28080869472.

It is an arithmetic number, because the mean of its divisors is an integer number (56161738940).

Almost surely, 2^168485216817 is an apocalyptic number.

It is an amenable number.

168485216817 is a deficient number, since it is larger than the sum of its proper divisors (56161738943).

168485216817 is an equidigital number, since it uses as much as digits as its factorization.

168485216817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56161738942.

The product of its digits is 5160960, while the sum is 57.

The spelling of 168485216817 in words is "one hundred sixty-eight billion, four hundred eighty-five million, two hundred sixteen thousand, eight hundred seventeen".