168520201685 has 32 divisors (see below), whose sum is σ = 222441206400. Its totient is φ = 121544467200.

The previous prime is 168520201679. The next prime is 168520201741. The reversal of 168520201685 is 586102025861.

It is not a de Polignac number, because 168520201685 - 2¹⁶ = 168520136149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5253395 + ... + 5285375.

It is an arithmetic number, because the mean of its divisors is an integer number (6951287700).

Almost surely, 2^168520201685 is an apocalyptic number.

It is an amenable number.

168520201685 is a deficient number, since it is larger than the sum of its proper divisors (53921004715).

168520201685 is a wasteful number, since it uses less digits than its factorization.

168520201685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32789.

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 168520201685 in words is "one hundred sixty-eight billion, five hundred twenty million, two hundred one thousand, six hundred eighty-five".