161768112 has 80 divisors (see below), whose sum is σ = 459137280. Its totient is φ = 48672000.

The previous prime is 161768111. The next prime is 161768171. The reversal of 161768112 is 211867161.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (161768111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78714 + ... + 80742.

It is an arithmetic number, because the mean of its divisors is an integer number (5739216).

Almost surely, 2^161768112 is an apocalyptic number.

161768112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161768112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229568640).

161768112 is an abundant number, since it is smaller than the sum of its proper divisors (297369168).

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

161768112 is a wasteful number, since it uses less digits than its factorization.

161768112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202 (or 2196 counting only the distinct ones).

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

The square root of 161768112 is about 12718.8093782398. The cubic root of 161768112 is about 544.8759496583.

The spelling of 161768112 in words is "one hundred sixty-one million, seven hundred sixty-eight thousand, one hundred twelve".