161441005 has 48 divisors (see below), whose sum is σ = 229112064. Its totient is φ = 108236160.

The previous prime is 161440991. The next prime is 161441017. The reversal of 161441005 is 500144161.

It is not a de Polignac number, because 161441005 - 2⁵ = 161440973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 933099 + ... + 933271.

It is an arithmetic number, because the mean of its divisors is an integer number (4773168).

Almost surely, 2^161441005 is an apocalyptic number.

It is an amenable number.

161441005 is a deficient number, since it is larger than the sum of its proper divisors (67671059).

161441005 is a wasteful number, since it uses less digits than its factorization.

161441005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 161441005 is about 12705.9436878966. The cubic root of 161441005 is about 544.5084421122.

Adding to 161441005 its reverse (500144161), we get a palindrome (661585166).

The spelling of 161441005 in words is "one hundred sixty-one million, four hundred forty-one thousand, five".