16561074725606 has 8 divisors (see below), whose sum is σ = 26149065356280. Its totient is φ = 7844719606848.

The previous prime is 16561074725603. The next prime is 16561074725641. The reversal of 16561074725606 is 60652747016561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16561074725603) 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, 217908877931 + ... + 217908878006.

It is an arithmetic number, because the mean of its divisors is an integer number (3268633169535).

Almost surely, 2^{16561074725606} is an apocalyptic number.

16561074725606 is a deficient number, since it is larger than the sum of its proper divisors (9587990630674).

16561074725606 is a wasteful number, since it uses less digits than its factorization.

16561074725606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435817755958.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 16561074725606 in words is "sixteen trillion, five hundred sixty-one billion, seventy-four million, seven hundred twenty-five thousand, six hundred six".