165449945 has 16 divisors (see below), whose sum is σ = 206330880. Its totient is φ = 127224000.

The previous prime is 165449923. The next prime is 165449969. The reversal of 165449945 is 549944561.

165449945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165449945 - 2⁸ = 165449689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165449945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19871 + ... + 26939.

It is an arithmetic number, because the mean of its divisors is an integer number (12895680).

Almost surely, 2^165449945 is an apocalyptic number.

It is an amenable number.

165449945 is a deficient number, since it is larger than the sum of its proper divisors (40880935).

165449945 is a wasteful number, since it uses less digits than its factorization.

165449945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256.

The product of its digits is 777600, while the sum is 47.

The square root of 165449945 is about 12862.7347403264. The cubic root of 165449945 is about 548.9787605848.

The spelling of 165449945 in words is "one hundred sixty-five million, four hundred forty-nine thousand, nine hundred forty-five".