189689809922 has 6 divisors (see below), whose sum is σ = 284535638793. Its totient is φ = 94844596992.

The previous prime is 189689809879. The next prime is 189689809963. The reversal of 189689809922 is 229908986981.

It can be written as a sum of positive squares in 2 ways, for example, as 175669118641 + 14020691281 = 419129^2 + 118409^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307969.

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, 461954 + ... + 769922.

Almost surely, 2^189689809922 is an apocalyptic number.

189689809922 is a deficient number, since it is larger than the sum of its proper divisors (94845828871).

189689809922 is an frugal number, since it uses more digits than its factorization.

189689809922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615940 (or 307971 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 71.

The spelling of 189689809922 in words is "one hundred eighty-nine billion, six hundred eighty-nine million, eight hundred nine thousand, nine hundred twenty-two".