163317073573 has 4 divisors (see below), whose sum is σ = 163349592448. Its totient is φ = 163284554700.

The previous prime is 163317073559. The next prime is 163317073609. The reversal of 163317073573 is 375370713361.

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: 375370713361 = 7 ⋅53624387623.

It is a cyclic number.

It is not a de Polignac number, because 163317073573 - 2²¹ = 163314976421 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 (163317073553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16251903 + ... + 16261948.

It is an arithmetic number, because the mean of its divisors is an integer number (40837398112).

Almost surely, 2^163317073573 is an apocalyptic number.

It is an amenable number.

163317073573 is a deficient number, since it is larger than the sum of its proper divisors (32518875).

163317073573 is an equidigital number, since it uses as much as digits as its factorization.

163317073573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32518874.

The product of its (nonzero) digits is 833490, while the sum is 46.

The spelling of 163317073573 in words is "one hundred sixty-three billion, three hundred seventeen million, seventy-three thousand, five hundred seventy-three".