168051318353 has 4 divisors (see below), whose sum is σ = 169179179700. Its totient is φ = 166923457008.

The previous prime is 168051318343. The next prime is 168051318359. The reversal of 168051318353 is 353813150861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41360170384 + 126691147969 = 203372^2 + 355937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168051318353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168051318359) 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 3 ways as a sum of consecutive naturals, for example, 563930450 + ... + 563930747.

It is an arithmetic number, because the mean of its divisors is an integer number (42294794925).

Almost surely, 2^168051318353 is an apocalyptic number.

It is an amenable number.

168051318353 is a deficient number, since it is larger than the sum of its proper divisors (1127861347).

168051318353 is a wasteful number, since it uses less digits than its factorization.

168051318353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127861346.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 168051318353 in words is "one hundred sixty-eight billion, fifty-one million, three hundred eighteen thousand, three hundred fifty-three".