161343444343161 has 32 divisors (see below), whose sum is σ = 219299147020800. Its totient is φ = 105495262970240.

The previous prime is 161343444343141. The next prime is 161343444343163.

It is a happy number.

161343444343161 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 161343444343161 - 2⁹ = 161343444342649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161343444343161.

It is not an unprimeable number, because it can be changed into a prime (161343444343163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78275470 + ... + 80310248.

It is an arithmetic number, because the mean of its divisors is an integer number (6853098344400).

Almost surely, 2^{161343444343161} is an apocalyptic number.

It is an amenable number.

161343444343161 is a deficient number, since it is larger than the sum of its proper divisors (57955702677639).

161343444343161 is a wasteful number, since it uses less digits than its factorization.

161343444343161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037269.

The product of its digits is 2985984, while the sum is 48.

The spelling of 161343444343161 in words is "one hundred sixty-one trillion, three hundred forty-three billion, four hundred forty-four million, three hundred forty-three thousand, one hundred sixty-one".