168503703681 has 8 divisors (see below), whose sum is σ = 224673729984. Its totient is φ = 112334739920.

The previous prime is 168503703653. The next prime is 168503703749. The reversal of 168503703681 is 186307305861.

168503703681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 168503703681 - 2¹⁰ = 168503702657 is a prime.

It is a super-2 number, since 2×168503703681² (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 168503703681.

It is not an unprimeable number, because it can be changed into a prime (168503703611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244180 + ... + 629786.

It is an arithmetic number, because the mean of its divisors is an integer number (28084216248).

Almost surely, 2^168503703681 is an apocalyptic number.

It is an amenable number.

168503703681 is a deficient number, since it is larger than the sum of its proper divisors (56170026303).

168503703681 is a wasteful number, since it uses less digits than its factorization.

168503703681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531271.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 168503703681 in words is "one hundred sixty-eight billion, five hundred three million, seven hundred three thousand, six hundred eighty-one".