163636426513253 has 4 divisors (see below), whose sum is σ = 163636906604160. Its totient is φ = 163635946422348.

The previous prime is 163636426513207. The next prime is 163636426513279. The reversal of 163636426513253 is 352315624636361.

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 not a de Polignac number, because 163636426513253 - 2²⁸ = 163636158077797 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 (163636426513283) 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, 239533823 + ... + 240215996.

It is an arithmetic number, because the mean of its divisors is an integer number (40909226651040).

Almost surely, 2^{163636426513253} is an apocalyptic number.

It is an amenable number.

163636426513253 is a deficient number, since it is larger than the sum of its proper divisors (480090907).

163636426513253 is an equidigital number, since it uses as much as digits as its factorization.

163636426513253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480090906.

The product of its digits is 41990400, while the sum is 56.

The spelling of 163636426513253 in words is "one hundred sixty-three trillion, six hundred thirty-six billion, four hundred twenty-six million, five hundred thirteen thousand, two hundred fifty-three".