16560688913 has 4 divisors (see below), whose sum is σ = 16561612800. Its totient is φ = 16559765028.

The previous prime is 16560688891. The next prime is 16560688981. The reversal of 16560688913 is 31988606561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31988606561 = 1429 ⋅22385309.

It is a cyclic number.

It is not a de Polignac number, because 16560688913 - 2⁶ = 16560688849 is a prime.

It is a super-2 number, since 2×16560688913² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16560688213) 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, 434513 + ... + 471086.

It is an arithmetic number, because the mean of its divisors is an integer number (4140403200).

Almost surely, 2^16560688913 is an apocalyptic number.

It is an amenable number.

16560688913 is a deficient number, since it is larger than the sum of its proper divisors (923887).

16560688913 is an equidigital number, since it uses as much as digits as its factorization.

16560688913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923886.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 16560688913 in words is "sixteen billion, five hundred sixty million, six hundred eighty-eight thousand, nine hundred thirteen".