189168633909 has 12 divisors (see below), whose sum is σ = 273249037152. Its totient is φ = 126109905000.

The previous prime is 189168633859. The next prime is 189168633911. The reversal of 189168633909 is 909336861981.

189168633909 is a `hidden beast` number, since 1 + 89 + 168 + 6 + 3 + 390 + 9 = 666.

It is not a de Polignac number, because 189168633909 - 2¹⁷ = 189168502837 is a prime.

It is a super-3 number, since 3×189168633909³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189168633919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342634 + ... + 704084.

It is an arithmetic number, because the mean of its divisors is an integer number (22770753096).

Almost surely, 2^189168633909 is an apocalyptic number.

It is an amenable number.

189168633909 is a deficient number, since it is larger than the sum of its proper divisors (84080403243).

189168633909 is a wasteful number, since it uses less digits than its factorization.

189168633909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419608 (or 419605 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The spelling of 189168633909 in words is "one hundred eighty-nine billion, one hundred sixty-eight million, six hundred thirty-three thousand, nine hundred nine".