161244441 has 6 divisors (see below), whose sum is σ = 232908650. Its totient is φ = 107496288.

The previous prime is 161244403. The next prime is 161244449. The reversal of 161244441 is 144442161.

161244441 is a `hidden beast` number, since 1 + 612 + 4 + 4 + 4 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 9585216 = 12315^2 + 3096^2 .

It is not a de Polignac number, because 161244441 - 2⁷ = 161244313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161244449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8958016 + ... + 8958033.

Almost surely, 2^161244441 is an apocalyptic number.

It is an amenable number.

161244441 is a deficient number, since it is larger than the sum of its proper divisors (71664209).

161244441 is a wasteful number, since it uses less digits than its factorization.

161244441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17916055 (or 17916052 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 161244441 is about 12698.2062119025. The cubic root of 161244441 is about 544.2873619193.

The spelling of 161244441 in words is "one hundred sixty-one million, two hundred forty-four thousand, four hundred forty-one".