161544 has 32 divisors (see below), whose sum is σ = 414720. Its totient is φ = 52416.

The previous prime is 161543. The next prime is 161561. The reversal of 161544 is 445161.

It is a self number, because there is not a number n which added to its sum of digits gives 161544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209 + ... + 1335.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2¹⁶¹⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207360).

161544 is an abundant number, since it is smaller than the sum of its proper divisors (253176).

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

161544 is a wasteful number, since it uses less digits than its factorization.

161544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 185 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 161544 is about 401.9253662062. The cubic root of 161544 is about 54.4624211389.

The spelling of 161544 in words is "one hundred sixty-one thousand, five hundred forty-four".