163606401322513 has 4 divisors (see below), whose sum is σ = 170719723119168. Its totient is φ = 156493079525860.

The previous prime is 163606401322489. The next prime is 163606401322547. The reversal of 163606401322513 is 315223104606361.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163606401322513 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 163606401322513.

It is not an unprimeable number, because it can be changed into a prime (163606401322613) 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, 3556660898293 + ... + 3556660898338.

It is an arithmetic number, because the mean of its divisors is an integer number (42679930779792).

Almost surely, 2^{163606401322513} is an apocalyptic number.

It is an amenable number.

163606401322513 is a deficient number, since it is larger than the sum of its proper divisors (7113321796655).

163606401322513 is an equidigital number, since it uses as much as digits as its factorization.

163606401322513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113321796654.

The product of its (nonzero) digits is 466560, while the sum is 43.

Adding to 163606401322513 its reverse (315223104606361), we get a palindrome (478829505928874).

The spelling of 163606401322513 in words is "one hundred sixty-three trillion, six hundred six billion, four hundred one million, three hundred twenty-two thousand, five hundred thirteen".