163957743171 has 6 divisors (see below), whose sum is σ = 236827851260. Its totient is φ = 109305162108.

The previous prime is 163957743161. The next prime is 163957743217. The reversal of 163957743171 is 171347759361.

It is a happy number.

163957743171 is a `hidden beast` number, since 1 + 6 + 39 + 577 + 4 + 31 + 7 + 1 = 666.

It is not a de Polignac number, because 163957743171 - 2¹⁴ = 163957726787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163957743101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9108763501 + ... + 9108763518.

Almost surely, 2^163957743171 is an apocalyptic number.

163957743171 is a deficient number, since it is larger than the sum of its proper divisors (72870108089).

163957743171 is a wasteful number, since it uses less digits than its factorization.

163957743171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18217527025 (or 18217527022 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The spelling of 163957743171 in words is "one hundred sixty-three billion, nine hundred fifty-seven million, seven hundred forty-three thousand, one hundred seventy-one".