168229821719 has 4 divisors (see below), whose sum is σ = 168262897344. Its totient is φ = 168196746096.

The previous prime is 168229821713. The next prime is 168229821757. The reversal of 168229821719 is 917128922861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917128922861 = 19559 ⋅46890379.

It is a cyclic number.

It is not a de Polignac number, because 168229821719 - 2¹⁶ = 168229756183 is a prime.

It is a super-2 number, since 2×168229821719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168229821713) 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, 16530182 + ... + 16540355.

It is an arithmetic number, because the mean of its divisors is an integer number (42065724336).

Almost surely, 2^168229821719 is an apocalyptic number.

168229821719 is a deficient number, since it is larger than the sum of its proper divisors (33075625).

168229821719 is an equidigital number, since it uses as much as digits as its factorization.

168229821719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33075624.

The product of its digits is 1741824, while the sum is 56.

The spelling of 168229821719 in words is "one hundred sixty-eight billion, two hundred twenty-nine million, eight hundred twenty-one thousand, seven hundred nineteen".