161128176 has 160 divisors (see below), whose sum is σ = 498182400. Its totient is φ = 44298240.

The previous prime is 161128171. The next prime is 161128211. The reversal of 161128176 is 671821161.

It is a happy number.

161128176 is a nontrivial binomial coefficient, being equal to C(17952, 2).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161128171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259995 + ... + 260613.

It is an arithmetic number, because the mean of its divisors is an integer number (3113640).

Almost surely, 2^161128176 is an apocalyptic number.

161128176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161128176 is the 17951-st triangular number and also the 8976-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161128176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249091200).

161128176 is an abundant number, since it is smaller than the sum of its proper divisors (337054224).

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

161128176 is a wasteful number, since it uses less digits than its factorization.

161128176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 681 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 161128176 is about 12693.6273775466. The cubic root of 161128176 is about 544.1565113392.

The spelling of 161128176 in words is "one hundred sixty-one million, one hundred twenty-eight thousand, one hundred seventy-six".