2644225541 has 2 divisors, whose sum is σ = 2644225542. Its totient is φ = 2644225540.

The previous prime is 2644225517. The next prime is 2644225547. The reversal of 2644225541 is 1455224462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2406294916 + 237930625 = 49054^2 + 15425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644225541 - 2¹⁸ = 2643963397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2644225547) 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, 1322112770 + 1322112771.

It is an arithmetic number, because the mean of its divisors is an integer number (1322112771).

Almost surely, 2^2644225541 is an apocalyptic number.

It is an amenable number.

2644225541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644225541 is an equidigital number, since it uses as much as digits as its factorization.

2644225541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 35.

The square root of 2644225541 is about 51422.0336140064. The cubic root of 2644225541 is about 1382.8216336629.

The spelling of 2644225541 in words is "two billion, six hundred forty-four million, two hundred twenty-five thousand, five hundred forty-one".