161728432301 has 2 divisors, whose sum is σ = 161728432302. Its totient is φ = 161728432300.

The previous prime is 161728432279. The next prime is 161728432373. The reversal of 161728432301 is 103234827161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92151709225 + 69576723076 = 303565^2 + 263774^2 .

It is a cyclic number.

It is not a de Polignac number, because 161728432301 - 2⁶ = 161728432237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161728435301) by changing a digit.

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 as a sum of consecutive naturals, namely, 80864216150 + 80864216151.

It is an arithmetic number, because the mean of its divisors is an integer number (80864216151).

Almost surely, 2^161728432301 is an apocalyptic number.

It is an amenable number.

161728432301 is a deficient number, since it is larger than the sum of its proper divisors (1).

161728432301 is an equidigital number, since it uses as much as digits as its factorization.

161728432301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 161728432301 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, three hundred one".