43444710721 has 2 divisors, whose sum is σ = 43444710722. Its totient is φ = 43444710720.

The previous prime is 43444710697. The next prime is 43444710761. The reversal of 43444710721 is 12701744434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40160160000 + 3284550721 = 200400^2 + 57311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43444710721 is a prime.

It is not a weakly prime, because it can be changed into another prime (43444710761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21722355360 + 21722355361.

It is an arithmetic number, because the mean of its divisors is an integer number (21722355361).

Almost surely, 2^43444710721 is an apocalyptic number.

It is an amenable number.

43444710721 is a deficient number, since it is larger than the sum of its proper divisors (1).

43444710721 is an equidigital number, since it uses as much as digits as its factorization.

43444710721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 37.

The spelling of 43444710721 in words is "forty-three billion, four hundred forty-four million, seven hundred ten thousand, seven hundred twenty-one".