161728432346 has 16 divisors (see below), whose sum is σ = 261835497000. Its totient is φ = 74477641728.

The previous prime is 161728432301. The next prime is 161728432373. The reversal of 161728432346 is 643234827161.

It can be written as a sum of positive squares in 4 ways, for example, as 151044936025 + 10683496321 = 388645^2 + 103361^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161728432346.

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 7 ways as a sum of consecutive naturals, for example, 6915191 + ... + 6938538.

Almost surely, 2^161728432346 is an apocalyptic number.

161728432346 is a deficient number, since it is larger than the sum of its proper divisors (100107064654).

161728432346 is a wasteful number, since it uses less digits than its factorization.

161728432346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854193.

The product of its digits is 1161216, while the sum is 47.

The spelling of 161728432346 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, three hundred forty-six".