163420488009 has 15 divisors (see below), whose sum is σ = 244127398647. Its totient is φ = 108944566488.

The previous prime is 163420487999. The next prime is 163420488029. The reversal of 163420488009 is 900884024361.

It is a happy number.

The square root of 163420488009 is 404253.

It is a perfect power (a square), and thus also a powerful number.

163420488009 is a `hidden beast` number, since 1 + 634 + 2 + 0 + 4 + 8 + 8 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19800711225 + 143619776784 = 140715^2 + 378972^2 .

It is not a de Polignac number, because 163420488009 - 2¹⁵ = 163420455241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163420488029) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3615819 + ... + 3660735.

Almost surely, 2^163420488009 is an apocalyptic number.

163420488009 is the 404253-rd square number.

163420488009 is the 202127-th centered octagonal number.

It is an amenable number.

163420488009 is a deficient number, since it is larger than the sum of its proper divisors (80706910638).

163420488009 is an frugal number, since it uses more digits than its factorization.

163420488009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89846 (or 44920 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 163420488009 in words is "one hundred sixty-three billion, four hundred twenty million, four hundred eighty-eight thousand, nine".