161489156 has 12 divisors (see below), whose sum is σ = 283171392. Its totient is φ = 80583048.

The previous prime is 161489149. The next prime is 161489173. The reversal of 161489156 is 651984161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38120 + ... + 42143.

It is an arithmetic number, because the mean of its divisors is an integer number (23597616).

Almost surely, 2^161489156 is an apocalyptic number.

It is an amenable number.

161489156 is a deficient number, since it is larger than the sum of its proper divisors (121682236).

161489156 is a wasteful number, since it uses less digits than its factorization.

161489156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80770 (or 80768 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 161489156 is about 12707.8383685031. The cubic root of 161489156 is about 544.5625713172.

The spelling of 161489156 in words is "one hundred sixty-one million, four hundred eighty-nine thousand, one hundred fifty-six".