168866271823 has 4 divisors (see below), whose sum is σ = 177753970360. Its totient is φ = 159978573288.

The previous prime is 168866271737. The next prime is 168866271829. The reversal of 168866271823 is 328172668861.

It is a happy number.

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 168866271823 - 2³³ = 160276337231 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 (168866271829) 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, 4443849240 + ... + 4443849277.

It is an arithmetic number, because the mean of its divisors is an integer number (44438492590).

Almost surely, 2^168866271823 is an apocalyptic number.

168866271823 is a deficient number, since it is larger than the sum of its proper divisors (8887698537).

168866271823 is an equidigital number, since it uses as much as digits as its factorization.

168866271823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8887698536.

The product of its digits is 9289728, while the sum is 58.

The spelling of 168866271823 in words is "one hundred sixty-eight billion, eight hundred sixty-six million, two hundred seventy-one thousand, eight hundred twenty-three".