168731318153 has 4 divisors (see below), whose sum is σ = 168747464340. Its totient is φ = 168715171968.

The previous prime is 168731318117. The next prime is 168731318177. The reversal of 168731318153 is 351813137861.

168731318153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 351813137861 = 79 ⋅4453330859.

It can be written as a sum of positive squares in 2 ways, for example, as 122061493129 + 46669825024 = 349373^2 + 216032^2 .

It is a cyclic number.

It is not a de Polignac number, because 168731318153 - 2⁶ = 168731318089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 168731318098 and 168731318107.

It is not an unprimeable number, because it can be changed into a prime (168731318183) 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 3 ways as a sum of consecutive naturals, for example, 8057408 + ... + 8078321.

It is an arithmetic number, because the mean of its divisors is an integer number (42186866085).

Almost surely, 2^168731318153 is an apocalyptic number.

It is an amenable number.

168731318153 is a deficient number, since it is larger than the sum of its proper divisors (16146187).

168731318153 is a wasteful number, since it uses less digits than its factorization.

168731318153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16146186.

The product of its digits is 362880, while the sum is 47.

The spelling of 168731318153 in words is "one hundred sixty-eight billion, seven hundred thirty-one million, three hundred eighteen thousand, one hundred fifty-three".