16560611201 has 4 divisors (see below), whose sum is σ = 16562812500. Its totient is φ = 16558409904.

The previous prime is 16560611161. The next prime is 16560611209. The reversal of 16560611201 is 10211606561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10211606561 = 13 ⋅785508197.

It can be written as a sum of positive squares in 2 ways, for example, as 14544601201 + 2016010000 = 120601^2 + 44900^2 .

It is a cyclic number.

It is not a de Polignac number, because 16560611201 - 2¹⁰ = 16560610177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16560611209) 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, 1089326 + ... + 1104423.

It is an arithmetic number, because the mean of its divisors is an integer number (4140703125).

Almost surely, 2^16560611201 is an apocalyptic number.

It is an amenable number.

16560611201 is a deficient number, since it is larger than the sum of its proper divisors (2201299).

16560611201 is an equidigital number, since it uses as much as digits as its factorization.

16560611201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201298.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 16560611201 in words is "sixteen billion, five hundred sixty million, six hundred eleven thousand, two hundred one".