165636036 has 72 divisors (see below), whose sum is σ = 436561440. Its totient is φ = 54307584.

The previous prime is 165636019. The next prime is 165636047. The reversal of 165636036 is 630636561.

It is a happy number.

165636036 is a `hidden beast` number, since 1 + 6 + 563 + 60 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1016091 + ... + 1016253.

Almost surely, 2^165636036 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 165636036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218280720).

165636036 is an abundant number, since it is smaller than the sum of its proper divisors (270925404).

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

165636036 is a wasteful number, since it uses less digits than its factorization.

165636036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 165636036 is about 12869.9664335227. The cubic root of 165636036 is about 549.1845060520.

The spelling of 165636036 in words is "one hundred sixty-five million, six hundred thirty-six thousand, thirty-six".