168865645124 has 36 divisors (see below), whose sum is σ = 324870710892. Its totient is φ = 76745634240.

The previous prime is 168865645103. The next prime is 168865645153. The reversal of 168865645124 is 421546568861.

It can be written as a sum of positive squares in 2 ways, for example, as 87634945024 + 81230700100 = 296032^2 + 285010^2 .

It is a super-2 number, since 2×168865645124² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168865645124.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3790322 + ... + 3834614.

Almost surely, 2^168865645124 is an apocalyptic number.

It is an amenable number.

168865645124 is a deficient number, since it is larger than the sum of its proper divisors (156005065768).

168865645124 is a wasteful number, since it uses less digits than its factorization.

168865645124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52196 (or 52183 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 56.

The spelling of 168865645124 in words is "one hundred sixty-eight billion, eight hundred sixty-five million, six hundred forty-five thousand, one hundred twenty-four".