163545344033 has 4 divisors (see below), whose sum is σ = 163917885120. Its totient is φ = 163172802948.

The previous prime is 163545344023. The next prime is 163545344057. The reversal of 163545344033 is 330443545361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 330443545361 = 61 ⋅5417107301.

It is a cyclic number.

It is not a de Polignac number, because 163545344033 - 2²⁰ = 163544295457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163545344003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186269885 + ... + 186270762.

It is an arithmetic number, because the mean of its divisors is an integer number (40979471280).

Almost surely, 2^163545344033 is an apocalyptic number.

It is an amenable number.

163545344033 is a deficient number, since it is larger than the sum of its proper divisors (372541087).

163545344033 is an equidigital number, since it uses as much as digits as its factorization.

163545344033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372541086.

The product of its (nonzero) digits is 777600, while the sum is 41.

Adding to 163545344033 its reverse (330443545361), we get a palindrome (493988889394).

The spelling of 163545344033 in words is "one hundred sixty-three billion, five hundred forty-five million, three hundred forty-four thousand, thirty-three".