163634215133 has 4 divisors (see below), whose sum is σ = 163637311740. Its totient is φ = 163631118528.

The previous prime is 163634215127. The next prime is 163634215169. The reversal of 163634215133 is 331512436361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331512436361 = 384533 ⋅862117.

It can be written as a sum of positive squares in 2 ways, for example, as 8664444889 + 154969770244 = 93083^2 + 393662^2 .

It is a cyclic number.

It is not a de Polignac number, because 163634215133 - 2²⁸ = 163365779677 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 (163634215123) 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, 1467638 + ... + 1575191.

It is an arithmetic number, because the mean of its divisors is an integer number (40909327935).

Almost surely, 2^163634215133 is an apocalyptic number.

It is an amenable number.

163634215133 is a deficient number, since it is larger than the sum of its proper divisors (3096607).

163634215133 is an equidigital number, since it uses as much as digits as its factorization.

163634215133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096606.

The product of its digits is 116640, while the sum is 38.

The spelling of 163634215133 in words is "one hundred sixty-three billion, six hundred thirty-four million, two hundred fifteen thousand, one hundred thirty-three".