165384555 has 48 divisors (see below), whose sum is σ = 311641344. Its totient is φ = 74665920.

The previous prime is 165384553. The next prime is 165384599. The reversal of 165384555 is 555483561.

It is a happy number.

It is not a de Polignac number, because 165384555 - 2¹ = 165384553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165384553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59650 + ... + 62360.

It is an arithmetic number, because the mean of its divisors is an integer number (6492528).

Almost surely, 2^165384555 is an apocalyptic number.

165384555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165384555 is a deficient number, since it is larger than the sum of its proper divisors (146256789).

165384555 is a wasteful number, since it uses less digits than its factorization.

165384555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2809 counting only the distinct ones).

The product of its digits is 360000, while the sum is 42.

The square root of 165384555 is about 12860.1926501900. The cubic root of 165384555 is about 548.9064276275.

The spelling of 165384555 in words is "one hundred sixty-five million, three hundred eighty-four thousand, five hundred fifty-five".