168350001685 has 4 divisors (see below), whose sum is σ = 202020002028. Its totient is φ = 134680001344.

The previous prime is 168350001679. The next prime is 168350001691. The reversal of 168350001685 is 586100053861.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (168350001679) and next prime (168350001691).

It can be written as a sum of positive squares in 2 ways, for example, as 132949202884 + 35400798801 = 364622^2 + 188151^2 .

It is a cyclic number.

It is not a de Polignac number, because 168350001685 - 2⁵ = 168350001653 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 3 ways as a sum of consecutive naturals, for example, 16835000164 + ... + 16835000173.

It is an arithmetic number, because the mean of its divisors is an integer number (50505000507).

Almost surely, 2^168350001685 is an apocalyptic number.

It is an amenable number.

168350001685 is a deficient number, since it is larger than the sum of its proper divisors (33670000343).

168350001685 is an equidigital number, since it uses as much as digits as its factorization.

168350001685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670000342.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 168350001685 in words is "one hundred sixty-eight billion, three hundred fifty million, one thousand, six hundred eighty-five".