16432730161 has 4 divisors (see below), whose sum is σ = 16433104500. Its totient is φ = 16432355824.

The previous prime is 16432730129. The next prime is 16432730261. The reversal of 16432730161 is 16103723461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3280998400 + 13151731761 = 57280^2 + 114681^2 .

It is a cyclic number.

It is not a de Polignac number, because 16432730161 - 2⁵ = 16432730129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16432730261) 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, 110986 + ... + 212563.

It is an arithmetic number, because the mean of its divisors is an integer number (4108276125).

Almost surely, 2^16432730161 is an apocalyptic number.

It is an amenable number.

16432730161 is a deficient number, since it is larger than the sum of its proper divisors (374339).

16432730161 is an equidigital number, since it uses as much as digits as its factorization.

16432730161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374338.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 16432730161 in words is "sixteen billion, four hundred thirty-two million, seven hundred thirty thousand, one hundred sixty-one".