163634215117 has 4 divisors (see below), whose sum is σ = 163831603420. Its totient is φ = 163436826816.

The previous prime is 163634215099. The next prime is 163634215123. The reversal of 163634215117 is 711512436361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711512436361 = 61 ⋅11664138301.

It can be written as a sum of positive squares in 2 ways, for example, as 74802797001 + 88831418116 = 273501^2 + 298046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163634215117 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 163634215117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163634215127) 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, 98692908 + ... + 98694565.

It is an arithmetic number, because the mean of its divisors is an integer number (40957900855).

Almost surely, 2^163634215117 is an apocalyptic number.

It is an amenable number.

163634215117 is a deficient number, since it is larger than the sum of its proper divisors (197388303).

163634215117 is an equidigital number, since it uses as much as digits as its factorization.

163634215117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197388302.

The product of its digits is 90720, while the sum is 40.

The spelling of 163634215117 in words is "one hundred sixty-three billion, six hundred thirty-four million, two hundred fifteen thousand, one hundred seventeen".