163305211613 has 4 divisors (see below), whose sum is σ = 165605285088. Its totient is φ = 161005138140.

The previous prime is 163305211607. The next prime is 163305211621. The reversal of 163305211613 is 316112503361.

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: 316112503361 = 95527 ⋅3309143.

It is a cyclic number.

It is not a de Polignac number, because 163305211613 - 2⁶ = 163305211549 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 163305211613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163305211633) 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, 1150036631 + ... + 1150036772.

It is an arithmetic number, because the mean of its divisors is an integer number (41401321272).

Almost surely, 2^163305211613 is an apocalyptic number.

It is an amenable number.

163305211613 is a deficient number, since it is larger than the sum of its proper divisors (2300073475).

163305211613 is an equidigital number, since it uses as much as digits as its factorization.

163305211613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300073474.

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

Adding to 163305211613 its reverse (316112503361), we get a palindrome (479417714974).

The spelling of 163305211613 in words is "one hundred sixty-three billion, three hundred five million, two hundred eleven thousand, six hundred thirteen".