161975158 has 8 divisors (see below), whose sum is σ = 244052928. Its totient is φ = 80624184.

The previous prime is 161975153. The next prime is 161975161. The reversal of 161975158 is 851579161.

161975158 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161975153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181141 + ... + 182032.

It is an arithmetic number, because the mean of its divisors is an integer number (30506616).

Almost surely, 2^161975158 is an apocalyptic number.

161975158 is a deficient number, since it is larger than the sum of its proper divisors (82077770).

161975158 is a wasteful number, since it uses less digits than its factorization.

161975158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363398.

The product of its digits is 75600, while the sum is 43.

The square root of 161975158 is about 12726.9461380176. The cubic root of 161975158 is about 545.1083116661.

The spelling of 161975158 in words is "one hundred sixty-one million, nine hundred seventy-five thousand, one hundred fifty-eight".