168917498243 has 4 divisors (see below), whose sum is σ = 181911151968. Its totient is φ = 155923844520.

The previous prime is 168917498237. The next prime is 168917498317. The reversal of 168917498243 is 342894719861.

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

It is a cyclic number.

It is not a de Polignac number, because 168917498243 - 2⁴ = 168917498227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168917498213) 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, 6496826843 + ... + 6496826868.

It is an arithmetic number, because the mean of its divisors is an integer number (45477787992).

Almost surely, 2^168917498243 is an apocalyptic number.

168917498243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

168917498243 is a deficient number, since it is larger than the sum of its proper divisors (12993653725).

168917498243 is a wasteful number, since it uses less digits than its factorization.

168917498243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12993653724.

The product of its digits is 20901888, while the sum is 62.

The spelling of 168917498243 in words is "one hundred sixty-eight billion, nine hundred seventeen million, four hundred ninety-eight thousand, two hundred forty-three".