161768 has 16 divisors (see below), whose sum is σ = 308580. Its totient is φ = 79488.

The previous prime is 161761. The next prime is 161771. The reversal of 161768 is 867161.

It can be written as a sum of positive squares in 2 ways, for example, as 158404 + 3364 = 398^2 + 58^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161768.

It is not an unprimeable number, because it can be changed into a prime (161761) 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 3 ways as a sum of consecutive naturals, for example, 446 + ... + 722.

2¹⁶¹⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

161768 is a deficient number, since it is larger than the sum of its proper divisors (146812).

161768 is a wasteful number, since it uses less digits than its factorization.

161768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 352 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 161768 is about 402.2039283746. The cubic root of 161768 is about 54.4875823910.

It can be divided in two parts, 161 and 768, that added together give a palindrome (929).

The spelling of 161768 in words is "one hundred sixty-one thousand, seven hundred sixty-eight".