6442216873 has 2 divisors, whose sum is σ = 6442216874. Its totient is φ = 6442216872.

The previous prime is 6442216841. The next prime is 6442216943. The reversal of 6442216873 is 3786122446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4150967184 + 2291249689 = 64428^2 + 47867^2 .

It is a cyclic number.

It is not a de Polignac number, because 6442216873 - 2⁵ = 6442216841 is a prime.

It is not a weakly prime, because it can be changed into another prime (6442216813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221108436 + 3221108437.

It is an arithmetic number, because the mean of its divisors is an integer number (3221108437).

Almost surely, 2^6442216873 is an apocalyptic number.

It is an amenable number.

6442216873 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442216873 is an equidigital number, since it uses as much as digits as its factorization.

6442216873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 43.

The square root of 6442216873 is about 80263.4217623445. The cubic root of 6442216873 is about 1860.7089517156.

The spelling of 6442216873 in words is "six billion, four hundred forty-two million, two hundred sixteen thousand, eight hundred seventy-three".