163205163311 has 4 divisors (see below), whose sum is σ = 163726585872. Its totient is φ = 162683740752.

The previous prime is 163205163229. The next prime is 163205163343. The reversal of 163205163311 is 113361502361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163205163311 - 2¹⁴ = 163205146927 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 (163205163361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260710811 + ... + 260711436.

It is an arithmetic number, because the mean of its divisors is an integer number (40931646468).

Almost surely, 2^163205163311 is an apocalyptic number.

163205163311 is a deficient number, since it is larger than the sum of its proper divisors (521422561).

163205163311 is an equidigital number, since it uses as much as digits as its factorization.

163205163311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521422560.

The product of its (nonzero) digits is 9720, while the sum is 32.

Adding to 163205163311 its reverse (113361502361), we get a palindrome (276566665672).

The spelling of 163205163311 in words is "one hundred sixty-three billion, two hundred five million, one hundred sixty-three thousand, three hundred eleven".