161728432347 has 16 divisors (see below), whose sum is σ = 215854544000. Its totient is φ = 107710694784.

The previous prime is 161728432301. The next prime is 161728432373. The reversal of 161728432347 is 743234827161.

It is not a de Polignac number, because 161728432347 - 2¹⁴ = 161728415963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161728432296 and 161728432305.

It is not an unprimeable number, because it can be changed into a prime (161728432847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18417804 + ... + 18426582.

It is an arithmetic number, because the mean of its divisors is an integer number (13490909000).

Almost surely, 2^161728432347 is an apocalyptic number.

161728432347 is a deficient number, since it is larger than the sum of its proper divisors (54126111653).

161728432347 is a wasteful number, since it uses less digits than its factorization.

161728432347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14250.

The product of its digits is 1354752, while the sum is 48.

The spelling of 161728432347 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred thirty-two thousand, three hundred forty-seven".