163944575 has 12 divisors (see below), whose sum is σ = 212130768. Its totient is φ = 125452800.

The previous prime is 163944563. The next prime is 163944577. The reversal of 163944575 is 575449361.

It is not a de Polignac number, because 163944575 - 2¹⁰ = 163943551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163944577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141986 + ... + 143135.

It is an arithmetic number, because the mean of its divisors is an integer number (17677564).

Almost surely, 2^163944575 is an apocalyptic number.

163944575 is a deficient number, since it is larger than the sum of its proper divisors (48186193).

163944575 is a wasteful number, since it uses less digits than its factorization.

163944575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285154 (or 285149 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 163944575 is about 12804.0843093132. The cubic root of 163944575 is about 547.3086979251.

The spelling of 163944575 in words is "one hundred sixty-three million, nine hundred forty-four thousand, five hundred seventy-five".