168605520685 has 32 divisors (see below), whose sum is σ = 245323296000. Its totient is φ = 108596063232.

The previous prime is 168605520683. The next prime is 168605520701. The reversal of 168605520685 is 586025506861.

It is a cyclic number.

It is not a de Polignac number, because 168605520685 - 2¹ = 168605520683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168605520683) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 12967 + ... + 580843.

It is an arithmetic number, because the mean of its divisors is an integer number (7666353000).

Almost surely, 2^168605520685 is an apocalyptic number.

It is an amenable number.

168605520685 is a deficient number, since it is larger than the sum of its proper divisors (76717775315).

168605520685 is a wasteful number, since it uses less digits than its factorization.

168605520685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568405.

The product of its (nonzero) digits is 3456000, while the sum is 52.

The spelling of 168605520685 in words is "one hundred sixty-eight billion, six hundred five million, five hundred twenty thousand, six hundred eighty-five".