163634215073 has 24 divisors (see below), whose sum is σ = 191824209000. Its totient is φ = 139172560128.

The previous prime is 163634215027. The next prime is 163634215081. The reversal of 163634215073 is 370512436361.

163634215073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 40147335424 + 123486879649 = 200368^2 + 351407^2 .

It is not a de Polignac number, because 163634215073 - 2⁶ = 163634215009 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 163634215073.

It is not an unprimeable number, because it can be changed into a prime (163034215073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21672503 + ... + 21680051.

It is an arithmetic number, because the mean of its divisors is an integer number (7992675375).

Almost surely, 2^163634215073 is an apocalyptic number.

It is an amenable number.

163634215073 is a deficient number, since it is larger than the sum of its proper divisors (28189993927).

163634215073 is a wasteful number, since it uses less digits than its factorization.

163634215073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10929 (or 10922 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 163634215073 in words is "one hundred sixty-three billion, six hundred thirty-four million, two hundred fifteen thousand, seventy-three".