16645678313227 has 2 divisors, whose sum is σ = 16645678313228. Its totient is φ = 16645678313226.

The previous prime is 16645678313207. The next prime is 16645678313291. The reversal of 16645678313227 is 72231387654661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16645678313227 - 2²³ = 16645669924619 is a prime.

It is not a weakly prime, because it can be changed into another prime (16645678313207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322839156613 + 8322839156614.

It is an arithmetic number, because the mean of its divisors is an integer number (8322839156614).

Almost surely, 2^{16645678313227} is an apocalyptic number.

16645678313227 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645678313227 is an equidigital number, since it uses as much as digits as its factorization.

16645678313227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 61.

The spelling of 16645678313227 in words is "sixteen trillion, six hundred forty-five billion, six hundred seventy-eight million, three hundred thirteen thousand, two hundred twenty-seven".