16851669713 has 4 divisors (see below), whose sum is σ = 17842944420. Its totient is φ = 15860395008.

The previous prime is 16851669697. The next prime is 16851669727. The reversal of 16851669713 is 31796615861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31796615861 = 61861 ⋅514001.

It can be written as a sum of positive squares in 2 ways, for example, as 7783297729 + 9068371984 = 88223^2 + 95228^2 .

It is a cyclic number.

It is not a de Polignac number, because 16851669713 - 2⁴ = 16851669697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16851669733) 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, 495637328 + ... + 495637361.

It is an arithmetic number, because the mean of its divisors is an integer number (4460736105).

Almost surely, 2^16851669713 is an apocalyptic number.

It is an amenable number.

16851669713 is a deficient number, since it is larger than the sum of its proper divisors (991274707).

16851669713 is an equidigital number, since it uses as much as digits as its factorization.

16851669713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991274706.

The product of its digits is 1632960, while the sum is 53.

The spelling of 16851669713 in words is "sixteen billion, eight hundred fifty-one million, six hundred sixty-nine thousand, seven hundred thirteen".