43044250649 has 2 divisors, whose sum is σ = 43044250650. Its totient is φ = 43044250648.

The previous prime is 43044250553. The next prime is 43044250651. The reversal of 43044250649 is 94605244034.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38402281225 + 4641969424 = 195965^2 + 68132^2 .

It is a cyclic number.

It is not a de Polignac number, because 43044250649 - 2²⁰ = 43043202073 is a prime.

Together with 43044250651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43044250049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21522125324 + 21522125325.

It is an arithmetic number, because the mean of its divisors is an integer number (21522125325).

Almost surely, 2^43044250649 is an apocalyptic number.

It is an amenable number.

43044250649 is a deficient number, since it is larger than the sum of its proper divisors (1).

43044250649 is an equidigital number, since it uses as much as digits as its factorization.

43044250649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 43044250649 in words is "forty-three billion, forty-four million, two hundred fifty thousand, six hundred forty-nine".