16651560011 has 4 divisors (see below), whose sum is σ = 16653203832. Its totient is φ = 16649916192.

The previous prime is 16651559971. The next prime is 16651560077. The reversal of 16651560011 is 11006515661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11006515661 = 6863 ⋅1603747.

It is a cyclic number.

It is not a de Polignac number, because 16651560011 - 2³⁰ = 15577818187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16651560011.

It is not an unprimeable number, because it can be changed into a prime (16651565011) 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, 806621 + ... + 827006.

It is an arithmetic number, because the mean of its divisors is an integer number (4163300958).

Almost surely, 2^16651560011 is an apocalyptic number.

16651560011 is a deficient number, since it is larger than the sum of its proper divisors (1643821).

16651560011 is a wasteful number, since it uses less digits than its factorization.

16651560011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643820.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 16651560011 in words is "sixteen billion, six hundred fifty-one million, five hundred sixty thousand, eleven".