161936271 has 24 divisors (see below), whose sum is σ = 283050144. Its totient is φ = 87091200.

The previous prime is 161936239. The next prime is 161936287. The reversal of 161936271 is 172639161.

161936271 is a `hidden beast` number, since 1 + 619 + 36 + 2 + 7 + 1 = 666.

It is not a de Polignac number, because 161936271 - 2⁵ = 161936239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161946271) 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 23 ways as a sum of consecutive naturals, for example, 74530 + ... + 76671.

It is an arithmetic number, because the mean of its divisors is an integer number (11793756).

Almost surely, 2^161936271 is an apocalyptic number.

161936271 is a deficient number, since it is larger than the sum of its proper divisors (121113873).

161936271 is a wasteful number, since it uses less digits than its factorization.

161936271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151231 (or 151228 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 161936271 is about 12725.4183035372. The cubic root of 161936271 is about 545.0646849689.

The spelling of 161936271 in words is "one hundred sixty-one million, nine hundred thirty-six thousand, two hundred seventy-one".