163636256311247 has 2 divisors, whose sum is σ = 163636256311248. Its totient is φ = 163636256311246.

The previous prime is 163636256311223. The next prime is 163636256311279. The reversal of 163636256311247 is 742113652636361.

It is a weak prime.

It is an emirp because it is prime and its reverse (742113652636361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163636256311247 - 2¹² = 163636256307151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163636256311192 and 163636256311201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163636256311147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81818128155623 + 81818128155624.

It is an arithmetic number, because the mean of its divisors is an integer number (81818128155624).

Almost surely, 2^{163636256311247} is an apocalyptic number.

163636256311247 is a deficient number, since it is larger than the sum of its proper divisors (1).

163636256311247 is an equidigital number, since it uses as much as digits as its factorization.

163636256311247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 56.

The spelling of 163636256311247 in words is "one hundred sixty-three trillion, six hundred thirty-six billion, two hundred fifty-six million, three hundred eleven thousand, two hundred forty-seven".