16645816302851 has 4 divisors (see below), whose sum is σ = 17182778119104. Its totient is φ = 16108854486600.

The previous prime is 16645816302833. The next prime is 16645816302923. The reversal of 16645816302851 is 15820361854661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16645816302851 - 2²² = 16645812108547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16645816302251) 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, 268480908080 + ... + 268480908141.

It is an arithmetic number, because the mean of its divisors is an integer number (4295694529776).

Almost surely, 2^{16645816302851} is an apocalyptic number.

16645816302851 is a deficient number, since it is larger than the sum of its proper divisors (536961816253).

16645816302851 is an equidigital number, since it uses as much as digits as its factorization.

16645816302851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536961816252.

The product of its (nonzero) digits is 8294400, while the sum is 56.

The spelling of 16645816302851 in words is "sixteen trillion, six hundred forty-five billion, eight hundred sixteen million, three hundred two thousand, eight hundred fifty-one".