161355144 has 64 divisors (see below), whose sum is σ = 428716800. Its totient is φ = 50462784.

The previous prime is 161355133. The next prime is 161355149. The reversal of 161355144 is 441553161.

It is a happy number.

161355144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161355149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47139 + ... + 50445.

It is an arithmetic number, because the mean of its divisors is an integer number (6698700).

Almost surely, 2^161355144 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 161355144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214358400).

161355144 is an abundant number, since it is smaller than the sum of its proper divisors (267361656).

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

161355144 is a wasteful number, since it uses less digits than its factorization.

161355144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3438 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 161355144 is about 12702.5644654928. The cubic root of 161355144 is about 544.4118942948.

The spelling of 161355144 in words is "one hundred sixty-one million, three hundred fifty-five thousand, one hundred forty-four".