161728432296 has 32 divisors (see below), whose sum is σ = 404852428800. Its totient is φ = 53838631040.

The previous prime is 161728432279. The next prime is 161728432301. The reversal of 161728432296 is 692234827161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4409256 + ... + 4445783.

It is an arithmetic number, because the mean of its divisors is an integer number (12651638400).

Almost surely, 2^161728432296 is an apocalyptic number.

It is an amenable number.

161728432296 is an abundant number, since it is smaller than the sum of its proper divisors (243123996504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161728432296 is a wasteful number, since it uses less digits than its factorization.

161728432296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8855809 (or 8855805 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The spelling of 161728432296 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, two hundred ninety-six".