165645326 has 16 divisors (see below), whose sum is σ = 309778560. Its totient is φ = 64537080.

The previous prime is 165645313. The next prime is 165645329. The reversal of 165645326 is 623546561.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165645326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165645329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537656 + ... + 537963.

It is an arithmetic number, because the mean of its divisors is an integer number (19361160).

Almost surely, 2^165645326 is an apocalyptic number.

165645326 is a deficient number, since it is larger than the sum of its proper divisors (144133234).

165645326 is a wasteful number, since it uses less digits than its factorization.

165645326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075639.

The product of its digits is 129600, while the sum is 38.

The square root of 165645326 is about 12870.3273462644. The cubic root of 165645326 is about 549.1947731992.

The spelling of 165645326 in words is "one hundred sixty-five million, six hundred forty-five thousand, three hundred twenty-six".