27809168189 has 16 divisors (see below), whose sum is σ = 31944559680. Its totient is φ = 23942540160.

The previous prime is 27809168161. The next prime is 27809168197. The reversal of 27809168189 is 98186190872.

It is not a de Polignac number, because 27809168189 - 2²⁰ = 27808119613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27809162189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660287 + ... + 701139.

It is an arithmetic number, because the mean of its divisors is an integer number (1996534980).

Almost surely, 2^27809168189 is an apocalyptic number.

It is an amenable number.

27809168189 is a deficient number, since it is larger than the sum of its proper divisors (4135391491).

27809168189 is a wasteful number, since it uses less digits than its factorization.

27809168189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44140.

The product of its (nonzero) digits is 3483648, while the sum is 59.

The spelling of 27809168189 in words is "twenty-seven billion, eight hundred nine million, one hundred sixty-eight thousand, one hundred eighty-nine".