165380555 has 8 divisors (see below), whose sum is σ = 198635712. Its totient is φ = 132185088.

The previous prime is 165380521. The next prime is 165380563. The reversal of 165380555 is 555083561.

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

It is a cyclic number.

It is not a de Polignac number, because 165380555 - 2¹⁰ = 165379531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8579 + ... + 20108.

It is an arithmetic number, because the mean of its divisors is an integer number (24829464).

Almost surely, 2^165380555 is an apocalyptic number.

165380555 is a deficient number, since it is larger than the sum of its proper divisors (33255157).

165380555 is a wasteful number, since it uses less digits than its factorization.

165380555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29845.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 165380555 is about 12860.0371305840. The cubic root of 165380555 is about 548.9020022980.

The spelling of 165380555 in words is "one hundred sixty-five million, three hundred eighty thousand, five hundred fifty-five".