168128618423 has 4 divisors (see below), whose sum is σ = 168130772160. Its totient is φ = 168126464688.

The previous prime is 168128618417. The next prime is 168128618473. The reversal of 168128618423 is 324816821861.

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 168128618423 - 2¹⁶ = 168128552887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168128618473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955190 + ... + 1117427.

It is an arithmetic number, because the mean of its divisors is an integer number (42032693040).

Almost surely, 2^168128618423 is an apocalyptic number.

168128618423 is a deficient number, since it is larger than the sum of its proper divisors (2153737).

168128618423 is an equidigital number, since it uses as much as digits as its factorization.

168128618423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153736.

The product of its digits is 884736, while the sum is 50.

The spelling of 168128618423 in words is "one hundred sixty-eight billion, one hundred twenty-eight million, six hundred eighteen thousand, four hundred twenty-three".