161173159 has 16 divisors (see below), whose sum is σ = 192056832. Its totient is φ = 132376608.

The previous prime is 161173157. The next prime is 161173169. The reversal of 161173159 is 951371161.

It is not a de Polignac number, because 161173159 - 2¹ = 161173157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161173157) 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, 10902 + ... + 21004.

It is an arithmetic number, because the mean of its divisors is an integer number (12003552).

Almost surely, 2^161173159 is an apocalyptic number.

161173159 is a deficient number, since it is larger than the sum of its proper divisors (30883673).

161173159 is a wasteful number, since it uses less digits than its factorization.

161173159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10206.

The product of its digits is 5670, while the sum is 34.

The square root of 161173159 is about 12695.3991272429. The cubic root of 161173159 is about 544.2071449723.

The spelling of 161173159 in words is "one hundred sixty-one million, one hundred seventy-three thousand, one hundred fifty-nine".