161329126 has 16 divisors (see below), whose sum is σ = 277777440. Its totient is φ = 68837760.

The previous prime is 161329121. The next prime is 161329151. The reversal of 161329126 is 621923161.

161329126 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161329121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21955 + ... + 28366.

It is an arithmetic number, because the mean of its divisors is an integer number (17361090).

Almost surely, 2^161329126 is an apocalyptic number.

161329126 is a deficient number, since it is larger than the sum of its proper divisors (116448314).

161329126 is a wasteful number, since it uses less digits than its factorization.

161329126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50559.

The product of its digits is 3888, while the sum is 31.

The square root of 161329126 is about 12701.5403002943. The cubic root of 161329126 is about 544.3826311639.

The spelling of 161329126 in words is "one hundred sixty-one million, three hundred twenty-nine thousand, one hundred twenty-six".