168687003685 has 8 divisors (see below), whose sum is σ = 202426713720. Its totient is φ = 134948063424.

The previous prime is 168687003637. The next prime is 168687003689. The reversal of 168687003685 is 586300786861.

It can be written as a sum of positive squares in 4 ways, for example, as 25101332356 + 143585671329 = 158434^2 + 378927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168687003685 - 2²⁵ = 168653449253 is a prime.

It is a super-3 number, since 3×168687003685³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168687003689) 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 7 ways as a sum of consecutive naturals, for example, 550219 + ... + 800071.

It is an arithmetic number, because the mean of its divisors is an integer number (25303339215).

Almost surely, 2^168687003685 is an apocalyptic number.

It is an amenable number.

168687003685 is a deficient number, since it is larger than the sum of its proper divisors (33739710035).

168687003685 is a wasteful number, since it uses less digits than its factorization.

168687003685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384887.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 168687003685 in words is "one hundred sixty-eight billion, six hundred eighty-seven million, three thousand, six hundred eighty-five".