16851666668453 has 8 divisors (see below), whose sum is σ = 17896847351040. Its totient is φ = 15812475560640.

The previous prime is 16851666668449. The next prime is 16851666668497. The reversal of 16851666668453 is 35486666615861.

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

It is a cyclic number.

It is not a de Polignac number, because 16851666668453 - 2² = 16851666668449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16851666668443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1497387893 + ... + 1497399146.

It is an arithmetic number, because the mean of its divisors is an integer number (2237105918880).

Almost surely, 2^{16851666668453} is an apocalyptic number.

It is an amenable number.

16851666668453 is a deficient number, since it is larger than the sum of its proper divisors (1045180682587).

16851666668453 is a wasteful number, since it uses less digits than its factorization.

16851666668453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994787387.

The product of its digits is 895795200, while the sum is 71.

The spelling of 16851666668453 in words is "sixteen trillion, eight hundred fifty-one billion, six hundred sixty-six million, six hundred sixty-eight thousand, four hundred fifty-three".