165549140 has 24 divisors (see below), whose sum is σ = 355740000. Its totient is φ = 64679328.

The previous prime is 165549133. The next prime is 165549151. The reversal of 165549140 is 41945561.

It is a self number, because there is not a number n which added to its sum of digits gives 165549140.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 95390 + ... + 97109.

It is an arithmetic number, because the mean of its divisors is an integer number (14822500).

Almost surely, 2^165549140 is an apocalyptic number.

165549140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165549140 is an abundant number, since it is smaller than the sum of its proper divisors (190190860).

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

165549140 is a wasteful number, since it uses less digits than its factorization.

165549140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192551 (or 192549 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 165549140 is about 12866.5900688566. The cubic root of 165549140 is about 549.0884515023.

The spelling of 165549140 in words is "one hundred sixty-five million, five hundred forty-nine thousand, one hundred forty".