161544000 has 224 divisors, whose sum is σ = 547762176. Its totient is φ = 41932800.

The previous prime is 161543981. The next prime is 161544017. The reversal of 161544000 is 445161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1271937 + ... + 1272063.

Almost surely, 2^161544000 is an apocalyptic number.

161544000 is a gapful number since it is divisible by the number (10) 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 161544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273881088).

161544000 is an abundant number, since it is smaller than the sum of its proper divisors (386218176).

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

161544000 is a wasteful number, since it uses less digits than its factorization.

161544000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 190 counting only the distinct ones).

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

The square root of 161544000 is about 12709.9960660891. The cubic root of 161544000 is about 544.6242113886.

Adding to 161544000 its reverse (445161), we get a palindrome (161989161).

The spelling of 161544000 in words is "one hundred sixty-one million, five hundred forty-four thousand".