161441280 has 720 divisors, whose sum is σ = 764107344. Its totient is φ = 30965760.

The previous prime is 161441263. The next prime is 161441281. The reversal of 161441280 is 82144161.

It is a happy number.

161441280 is a `hidden beast` number, since 1 + 614 + 41 + 2 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161441281) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12418554 + ... + 12418566.

Almost surely, 2^161441280 is an apocalyptic number.

161441280 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 161441280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382053672).

161441280 is an abundant number, since it is smaller than the sum of its proper divisors (602666064).

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

161441280 is a wasteful number, since it uses less digits than its factorization.

161441280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 161441280 is about 12705.9545095990. The cubic root of 161441280 is about 544.5087512855.

It can be divided in two parts, 16144 and 1280, that added together give a square (17424 = 132²).

The spelling of 161441280 in words is "one hundred sixty-one million, four hundred forty-one thousand, two hundred eighty".