161729046 has 24 divisors (see below), whose sum is σ = 361717824. Its totient is φ = 52170480.

The previous prime is 161728993. The next prime is 161729093. The reversal of 161729046 is 640927161.

It is a self number, because there is not a number n which added to its sum of digits gives 161729046.

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 11 ways as a sum of consecutive naturals, for example, 144361 + ... + 145476.

It is an arithmetic number, because the mean of its divisors is an integer number (15071576).

Almost surely, 2^161729046 is an apocalyptic number.

161729046 is an abundant number, since it is smaller than the sum of its proper divisors (199988778).

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

161729046 is a wasteful number, since it uses less digits than its factorization.

161729046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289876 (or 289873 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 161729046 is about 12717.2735285516. The cubic root of 161729046 is about 544.8320847348.

The spelling of 161729046 in words is "one hundred sixty-one million, seven hundred twenty-nine thousand, forty-six".