161641730323 has 2 divisors, whose sum is σ = 161641730324. Its totient is φ = 161641730322.

The previous prime is 161641730321. The next prime is 161641730441. The reversal of 161641730323 is 323037146161.

It is a weak prime.

It is an emirp because it is prime and its reverse (323037146161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161641730323 - 2¹ = 161641730321 is a prime.

It is a super-2 number, since 2×161641730323² (a number of 23 digits) contains 22 as substring.

Together with 161641730321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161641730321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80820865161 + 80820865162.

It is an arithmetic number, because the mean of its divisors is an integer number (80820865162).

Almost surely, 2^161641730323 is an apocalyptic number.

161641730323 is a deficient number, since it is larger than the sum of its proper divisors (1).

161641730323 is an equidigital number, since it uses as much as digits as its factorization.

161641730323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

Adding to 161641730323 its reverse (323037146161), we get a palindrome (484678876484).

The spelling of 161641730323 in words is "one hundred sixty-one billion, six hundred forty-one million, seven hundred thirty thousand, three hundred twenty-three".