165018156 has 12 divisors (see below), whose sum is σ = 385042392. Its totient is φ = 55006048.

The previous prime is 165018151. The next prime is 165018157. The reversal of 165018156 is 651810561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (165018151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6875745 + ... + 6875768.

It is an arithmetic number, because the mean of its divisors is an integer number (32086866).

Almost surely, 2^165018156 is an apocalyptic number.

It is an amenable number.

165018156 is an abundant number, since it is smaller than the sum of its proper divisors (220024236).

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

165018156 is a wasteful number, since it uses less digits than its factorization.

165018156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13751520 (or 13751518 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 165018156 is about 12845.9392805664. The cubic root of 165018156 is about 548.5007721110.

The spelling of 165018156 in words is "one hundred sixty-five million, eighteen thousand, one hundred fifty-six".