161129916 has 36 divisors (see below), whose sum is σ = 421348200. Its totient is φ = 51857568.

The previous prime is 161129897. The next prime is 161129929. The reversal of 161129916 is 619921161.

161129916 is a `hidden beast` number, since 1 + 611 + 29 + 9 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76126 + ... + 78213.

Almost surely, 2^161129916 is an apocalyptic number.

It is an amenable number.

161129916 is an abundant number, since it is smaller than the sum of its proper divisors (260218284).

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

161129916 is a wasteful number, since it uses less digits than its factorization.

161129916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154378 (or 154373 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 161129916 is about 12693.6959156898. The cubic root of 161129916 is about 544.1584700881.

The spelling of 161129916 in words is "one hundred sixty-one million, one hundred twenty-nine thousand, nine hundred sixteen".