168819919427 has 4 divisors (see below), whose sum is σ = 169895205696. Its totient is φ = 167744633160.

The previous prime is 168819919409. The next prime is 168819919469. The reversal of 168819919427 is 724919918861.

168819919427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 168819919427 - 2¹⁰ = 168819918403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168819939427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537642899 + ... + 537643212.

It is an arithmetic number, because the mean of its divisors is an integer number (42473801424).

Almost surely, 2^168819919427 is an apocalyptic number.

168819919427 is a deficient number, since it is larger than the sum of its proper divisors (1075286269).

168819919427 is a wasteful number, since it uses less digits than its factorization.

168819919427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075286268.

The product of its digits is 15676416, while the sum is 65.

The spelling of 168819919427 in words is "one hundred sixty-eight billion, eight hundred nineteen million, nine hundred nineteen thousand, four hundred twenty-seven".