168262943889 has 4 divisors (see below), whose sum is σ = 224350591856. Its totient is φ = 112175295924.

The previous prime is 168262943873. The next prime is 168262943899. The reversal of 168262943889 is 988349262861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 168262943889 - 2⁴ = 168262943873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168262943899) 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, 28043823979 + ... + 28043823984.

It is an arithmetic number, because the mean of its divisors is an integer number (56087647964).

Almost surely, 2^168262943889 is an apocalyptic number.

It is an amenable number.

168262943889 is a deficient number, since it is larger than the sum of its proper divisors (56087647967).

168262943889 is an equidigital number, since it uses as much as digits as its factorization.

168262943889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56087647966.

The product of its digits is 71663616, while the sum is 66.

The spelling of 168262943889 in words is "one hundred sixty-eight billion, two hundred sixty-two million, nine hundred forty-three thousand, eight hundred eighty-nine".