16433321073561 has 20 divisors (see below), whose sum is σ = 28055475837312. Its totient is φ = 9390469184568.

The previous prime is 16433321073541. The next prime is 16433321073601. The reversal of 16433321073561 is 16537012333461.

16433321073561 is a `hidden beast` number, since 1 + 6 + 4 + 3 + 3 + 3 + 2 + 10 + 73 + 561 = 666.

It is not a de Polignac number, because 16433321073561 - 2²² = 16433316879257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16433321073541) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14491464225 + ... + 14491465358.

Almost surely, 2^{16433321073561} is an apocalyptic number.

It is an amenable number.

16433321073561 is a deficient number, since it is larger than the sum of its proper divisors (11622154763751).

16433321073561 is an equidigital number, since it uses as much as digits as its factorization.

16433321073561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28982929602 (or 28982929593 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 16433321073561 in words is "sixteen trillion, four hundred thirty-three billion, three hundred twenty-one million, seventy-three thousand, five hundred sixty-one".