161729116 has 12 divisors (see below), whose sum is σ = 286609120. Its totient is φ = 79840800.

The previous prime is 161729107. The next prime is 161729131. The reversal of 161729116 is 611927161.

161729116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255585 + ... + 256216.

Almost surely, 2^161729116 is an apocalyptic number.

It is an amenable number.

161729116 is a deficient number, since it is larger than the sum of its proper divisors (124880004).

161729116 is a wasteful number, since it uses less digits than its factorization.

161729116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511884 (or 511882 counting only the distinct ones).

The product of its digits is 4536, while the sum is 34.

The square root of 161729116 is about 12717.2762807136. The cubic root of 161729116 is about 544.8321633400.

The spelling of 161729116 in words is "one hundred sixty-one million, seven hundred twenty-nine thousand, one hundred sixteen".