2444664421 has 2 divisors, whose sum is σ = 2444664422. Its totient is φ = 2444664420.

The previous prime is 2444664377. The next prime is 2444664451. The reversal of 2444664421 is 1244664442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1773336321 + 671328100 = 42111^2 + 25910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2444664421 - 2⁷ = 2444664293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2444664451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222332210 + 1222332211.

It is an arithmetic number, because the mean of its divisors is an integer number (1222332211).

Almost surely, 2^2444664421 is an apocalyptic number.

It is an amenable number.

2444664421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2444664421 is an equidigital number, since it uses as much as digits as its factorization.

2444664421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 37.

The square root of 2444664421 is about 49443.5478197105. The cubic root of 2444664421 is about 1347.1204137556.

The spelling of 2444664421 in words is "two billion, four hundred forty-four million, six hundred sixty-four thousand, four hundred twenty-one".