163644265116413 has 4 divisors (see below), whose sum is σ = 163644298621440. Its totient is φ = 163644231611388.

The previous prime is 163644265116391. The next prime is 163644265116457. The reversal of 163644265116413 is 314611562446361.

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 163644265116413 - 2¹⁰ = 163644265115389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163644265116613) 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, 7848893 + ... + 19720386.

It is an arithmetic number, because the mean of its divisors is an integer number (40911074655360).

Almost surely, 2^{163644265116413} is an apocalyptic number.

It is an amenable number.

163644265116413 is a deficient number, since it is larger than the sum of its proper divisors (33505027).

163644265116413 is an equidigital number, since it uses as much as digits as its factorization.

163644265116413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33505026.

The product of its digits is 7464960, while the sum is 53.

The spelling of 163644265116413 in words is "one hundred sixty-three trillion, six hundred forty-four billion, two hundred sixty-five million, one hundred sixteen thousand, four hundred thirteen".