163505995189 has 16 divisors (see below), whose sum is σ = 173807904816. Its totient is φ = 153280512000.

The previous prime is 163505995151. The next prime is 163505995201. The reversal of 163505995189 is 981599505361.

It can be written as a sum of positive squares in 8 ways, for example, as 6265988964 + 157240006225 = 79158^2 + 396535^2 .

It is a cyclic number.

It is not a de Polignac number, because 163505995189 - 2⁹ = 163505994677 is a prime.

It is a super-2 number, since 2×163505995189² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163505995589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16509139 + ... + 16519039.

It is an arithmetic number, because the mean of its divisors is an integer number (10862994051).

Almost surely, 2^163505995189 is an apocalyptic number.

It is an amenable number.

163505995189 is a deficient number, since it is larger than the sum of its proper divisors (10301909627).

163505995189 is a wasteful number, since it uses less digits than its factorization.

163505995189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13656.

The product of its (nonzero) digits is 13122000, while the sum is 61.

The spelling of 163505995189 in words is "one hundred sixty-three billion, five hundred five million, nine hundred ninety-five thousand, one hundred eighty-nine".