165500159 has 4 divisors (see below), whose sum is σ = 180545640. Its totient is φ = 150454680.

The previous prime is 165500143. The next prime is 165500161. The reversal of 165500159 is 951005561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165500159 - 2⁴ = 165500143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165500189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7522724 + ... + 7522745.

It is an arithmetic number, because the mean of its divisors is an integer number (45136410).

Almost surely, 2^165500159 is an apocalyptic number.

165500159 is a deficient number, since it is larger than the sum of its proper divisors (15045481).

165500159 is a wasteful number, since it uses less digits than its factorization.

165500159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15045480.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 165500159 is about 12864.6865099776. The cubic root of 165500159 is about 549.0342932539.

The spelling of 165500159 in words is "one hundred sixty-five million, five hundred thousand, one hundred fifty-nine".