165363644 has 12 divisors (see below), whose sum is σ = 289513224. Its totient is φ = 82645584.

The previous prime is 165363623. The next prime is 165363647. The reversal of 165363644 is 446363561.

It is a junction number, because it is equal to n+sod(n) for n = 165363598 and 165363607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165363647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2987 + ... + 18429.

It is an arithmetic number, because the mean of its divisors is an integer number (24126102).

Almost surely, 2^165363644 is an apocalyptic number.

It is an amenable number.

165363644 is a deficient number, since it is larger than the sum of its proper divisors (124149580).

165363644 is a wasteful number, since it uses less digits than its factorization.

165363644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18124 (or 18122 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 165363644 is about 12859.3796117853. The cubic root of 165363644 is about 548.8832923230.

The spelling of 165363644 in words is "one hundred sixty-five million, three hundred sixty-three thousand, six hundred forty-four".