161896044241 has 8 divisors (see below), whose sum is σ = 162326775240. Its totient is φ = 161465484288.

The previous prime is 161896044229. The next prime is 161896044259. The reversal of 161896044241 is 142440698161.

It can be written as a sum of positive squares in 4 ways, for example, as 44942304016 + 116953740225 = 211996^2 + 341985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161896044241 - 2²⁹ = 161359173329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161896044191 and 161896044200.

It is not an unprimeable number, because it can be changed into a prime (161896042241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1979145 + ... + 2059321.

It is an arithmetic number, because the mean of its divisors is an integer number (20290846905).

Almost surely, 2^161896044241 is an apocalyptic number.

It is an amenable number.

161896044241 is a deficient number, since it is larger than the sum of its proper divisors (430730999).

161896044241 is an equidigital number, since it uses as much as digits as its factorization.

161896044241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85523.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 161896044241 in words is "one hundred sixty-one billion, eight hundred ninety-six million, forty-four thousand, two hundred forty-one".