400444044073 has 2 divisors, whose sum is σ = 400444044074. Its totient is φ = 400444044072.

The previous prime is 400444043957. The next prime is 400444044083. The reversal of 400444044073 is 370440444004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216734940304 + 183709103769 = 465548^2 + 428613^2 .

It is a cyclic number.

It is not a de Polignac number, because 400444044073 - 2²¹ = 400441946921 is a prime.

It is not a weakly prime, because it can be changed into another prime (400444044083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200222022036 + 200222022037.

It is an arithmetic number, because the mean of its divisors is an integer number (200222022037).

Almost surely, 2^400444044073 is an apocalyptic number.

It is an amenable number.

400444044073 is a deficient number, since it is larger than the sum of its proper divisors (1).

400444044073 is an equidigital number, since it uses as much as digits as its factorization.

400444044073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 34.

Adding to 400444044073 its reverse (370440444004), we get a palindrome (770884488077).

The spelling of 400444044073 in words is "four hundred billion, four hundred forty-four million, forty-four thousand, seventy-three".