161827158 has 8 divisors (see below), whose sum is σ = 323654328. Its totient is φ = 53942384.

The previous prime is 161827129. The next prime is 161827207. The reversal of 161827158 is 851728161.

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

161827158 is an admirable number.

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, 13485591 + ... + 13485602.

It is an arithmetic number, because the mean of its divisors is an integer number (40456791).

Almost surely, 2^161827158 is an apocalyptic number.

161827158 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161827158 is a wasteful number, since it uses less digits than its factorization.

161827158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26971198.

The product of its digits is 26880, while the sum is 39.

The square root of 161827158 is about 12721.1303743024. The cubic root of 161827158 is about 544.9422355522.

The spelling of 161827158 in words is "one hundred sixty-one million, eight hundred twenty-seven thousand, one hundred fifty-eight".