189612209672 has 12 divisors (see below), whose sum is σ = 355525202445. Its totient is φ = 94805489024.

The previous prime is 189612209669. The next prime is 189612209747. The reversal of 189612209672 is 276902216981.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 111159560836 + 78452648836 = 333406^2 + 280094^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307906.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1154648 + ... + 1308600.

Almost surely, 2^189612209672 is an apocalyptic number.

It is an amenable number.

189612209672 is a deficient number, since it is larger than the sum of its proper divisors (165912992773).

189612209672 is an frugal number, since it uses more digits than its factorization.

189612209672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307912 (or 153955 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 189612209672 in words is "one hundred eighty-nine billion, six hundred twelve million, two hundred nine thousand, six hundred seventy-two".