165818272 has 24 divisors (see below), whose sum is σ = 345659076. Its totient is φ = 78031872.

The previous prime is 165818267. The next prime is 165818273. The reversal of 165818272 is 272818561.

It can be written as a sum of positive squares in 2 ways, for example, as 165791376 + 26896 = 12876^2 + 164^2 .

It is not an unprimeable number, because it can be changed into a prime (165818273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151863 + ... + 152950.

Almost surely, 2^165818272 is an apocalyptic number.

It is an amenable number.

165818272 is an abundant number, since it is smaller than the sum of its proper divisors (179840804).

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

165818272 is a wasteful number, since it uses less digits than its factorization.

165818272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304840 (or 304832 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 165818272 is about 12877.0443813788. The cubic root of 165818272 is about 549.3858400707.

The spelling of 165818272 in words is "one hundred sixty-five million, eight hundred eighteen thousand, two hundred seventy-two".