165611140 has 12 divisors (see below), whose sum is σ = 347783436. Its totient is φ = 66244448.

The previous prime is 165611137. The next prime is 165611179. The reversal of 165611140 is 41116561.

It can be written as a sum of positive squares in 2 ways, for example, as 106874244 + 58736896 = 10338^2 + 7664^2 .

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 3 ways as a sum of consecutive naturals, for example, 4140259 + ... + 4140298.

It is an arithmetic number, because the mean of its divisors is an integer number (28981953).

Almost surely, 2^165611140 is an apocalyptic number.

165611140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165611140 is an abundant number, since it is smaller than the sum of its proper divisors (182172296).

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

165611140 is a wasteful number, since it uses less digits than its factorization.

165611140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280566 (or 8280564 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 165611140 is about 12868.9991840858. Note that the first 3 decimals coincide. The cubic root of 165611140 is about 549.1569895307.

The spelling of 165611140 in words is "one hundred sixty-five million, six hundred eleven thousand, one hundred forty".