165538485 has 40 divisors (see below), whose sum is σ = 339140736. Its totient is φ = 75673440.

The previous prime is 165538459. The next prime is 165538511. The reversal of 165538485 is 584835561.

165538485 is a `hidden beast` number, since 16 + 553 + 8 + 4 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (165538459) and next prime (165538511).

It is not a de Polignac number, because 165538485 - 2⁸ = 165538229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165538485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26361 + ... + 32030.

Almost surely, 2^165538485 is an apocalyptic number.

165538485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165538485 is an abundant number, since it is smaller than the sum of its proper divisors (173602251).

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

165538485 is an equidigital number, since it uses as much as digits as its factorization.

165538485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58415 (or 58406 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The square root of 165538485 is about 12866.1760053250. The cubic root of 165538485 is about 549.0766711875.

The spelling of 165538485 in words is "one hundred sixty-five million, five hundred thirty-eight thousand, four hundred eighty-five".