161728432484 has 12 divisors (see below), whose sum is σ = 284605902000. Its totient is φ = 80412460488.

The previous prime is 161728432457. The next prime is 161728432487. The reversal of 161728432484 is 484234827161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (161728432487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112938134 + ... + 112939565.

It is an arithmetic number, because the mean of its divisors is an integer number (23717158500).

Almost surely, 2^161728432484 is an apocalyptic number.

It is an amenable number.

161728432484 is a deficient number, since it is larger than the sum of its proper divisors (122877469516).

161728432484 is a wasteful number, since it uses less digits than its factorization.

161728432484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225877882 (or 225877880 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 50.

The spelling of 161728432484 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, four hundred eighty-four".