165018155 has 8 divisors (see below), whose sum is σ = 198660384. Its totient is φ = 131588800.

The previous prime is 165018151. The next prime is 165018157. The reversal of 165018155 is 551810561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165018155 - 2² = 165018151 is a prime.

It is a Duffinian number.

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

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 7 ways as a sum of consecutive naturals, for example, 51506 + ... + 54615.

It is an arithmetic number, because the mean of its divisors is an integer number (24832548).

Almost surely, 2^165018155 is an apocalyptic number.

165018155 is a deficient number, since it is larger than the sum of its proper divisors (33642229).

165018155 is a wasteful number, since it uses less digits than its factorization.

165018155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106437.

The product of its (nonzero) digits is 6000, while the sum is 32.

The square root of 165018155 is about 12845.9392416436. The cubic root of 165018155 is about 548.5007710031.

The spelling of 165018155 in words is "one hundred sixty-five million, eighteen thousand, one hundred fifty-five".