163965441 has 8 divisors (see below), whose sum is σ = 219410944. Its totient is φ = 108915120.

The previous prime is 163965427. The next prime is 163965491. The reversal of 163965441 is 144569361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163965441 - 2¹⁰ = 163964417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163965441.

It is not an unprimeable number, because it can be changed into a prime (163965491) 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, 97825 + ... + 99486.

It is an arithmetic number, because the mean of its divisors is an integer number (27426368).

Almost surely, 2^163965441 is an apocalyptic number.

It is an amenable number.

163965441 is a deficient number, since it is larger than the sum of its proper divisors (55445503).

163965441 is a wasteful number, since it uses less digits than its factorization.

163965441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197591.

The product of its digits is 77760, while the sum is 39.

The square root of 163965441 is about 12804.8991015158. The cubic root of 163965441 is about 547.3319164607.

The spelling of 163965441 in words is "one hundred sixty-three million, nine hundred sixty-five thousand, four hundred forty-one".