165545416 has 16 divisors (see below), whose sum is σ = 310614300. Its totient is φ = 82714944.

The previous prime is 165545383. The next prime is 165545417. The reversal of 165545416 is 614545561.

It can be written as a sum of positive squares in 2 ways, for example, as 158004900 + 7540516 = 12570^2 + 2746^2 .

It is a super-2 number, since 2×165545416² = 54810569517226112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165545417) 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, 6490 + ... + 19318.

Almost surely, 2^165545416 is an apocalyptic number.

It is an amenable number.

165545416 is a deficient number, since it is larger than the sum of its proper divisors (145068884).

165545416 is a wasteful number, since it uses less digits than its factorization.

165545416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14448 (or 14444 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 165545416 is about 12866.4453521553. The cubic root of 165545416 is about 549.0843342540.

The spelling of 165545416 in words is "one hundred sixty-five million, five hundred forty-five thousand, four hundred sixteen".