216927651643 has 2 divisors, whose sum is σ = 216927651644. Its totient is φ = 216927651642.

The previous prime is 216927651641. The next prime is 216927651701. The reversal of 216927651643 is 346156729612.

216927651643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216927651643 - 2¹ = 216927651641 is a prime.

Together with 216927651641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (216927651641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108463825821 + 108463825822.

It is an arithmetic number, because the mean of its divisors is an integer number (108463825822).

Almost surely, 2^216927651643 is an apocalyptic number.

216927651643 is a deficient number, since it is larger than the sum of its proper divisors (1).

216927651643 is an equidigital number, since it uses as much as digits as its factorization.

216927651643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The spelling of 216927651643 in words is "two hundred sixteen billion, nine hundred twenty-seven million, six hundred fifty-one thousand, six hundred forty-three".