165189031236 has 144 divisors (see below), whose sum is σ = 438858061824. Its totient is φ = 54323377056.

The previous prime is 165189031219. The next prime is 165189031379. The reversal of 165189031236 is 632130981561.

165189031236 is a `hidden beast` number, since 1 + 6 + 518 + 9 + 0 + 3 + 123 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 165189031191 and 165189031200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107056281 + ... + 107057823.

Almost surely, 2^165189031236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165189031236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219429030912).

165189031236 is an abundant number, since it is smaller than the sum of its proper divisors (273669030588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165189031236 is a wasteful number, since it uses less digits than its factorization.

165189031236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972 (or 2958 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 165189031236 in words is "one hundred sixty-five billion, one hundred eighty-nine million, thirty-one thousand, two hundred thirty-six".