161155166 has 8 divisors (see below), whose sum is σ = 243216264. Its totient is φ = 80083080.

The previous prime is 161155157. The next prime is 161155171. The reversal of 161155166 is 661551161.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246845 + ... + 247496.

It is an arithmetic number, because the mean of its divisors is an integer number (30402033).

Almost surely, 2^161155166 is an apocalyptic number.

161155166 is a deficient number, since it is larger than the sum of its proper divisors (82061098).

161155166 is a wasteful number, since it uses less digits than its factorization.

161155166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494506.

The product of its digits is 5400, while the sum is 32.

The square root of 161155166 is about 12694.6904649148. The cubic root of 161155166 is about 544.1868928748.

The spelling of 161155166 in words is "one hundred sixty-one million, one hundred fifty-five thousand, one hundred sixty-six".