444413444664989 has 2 divisors, whose sum is σ = 444413444664990. Its totient is φ = 444413444664988.

The previous prime is 444413444664949. The next prime is 444413444665049. The reversal of 444413444664989 is 989466444314444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435830548668025 + 8582895996964 = 20876555^2 + 2929658^2 .

It is a cyclic number.

It is not a de Polignac number, because 444413444664989 - 2⁸ = 444413444664733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444413444664949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222206722332494 + 222206722332495.

It is an arithmetic number, because the mean of its divisors is an integer number (222206722332495).

Almost surely, 2^{444413444664989} is an apocalyptic number.

It is an amenable number.

444413444664989 is a deficient number, since it is larger than the sum of its proper divisors (1).

444413444664989 is an equidigital number, since it uses as much as digits as its factorization.

444413444664989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4586471424, while the sum is 74.

The spelling of 444413444664989 in words is "four hundred forty-four trillion, four hundred thirteen billion, four hundred forty-four million, six hundred sixty-four thousand, nine hundred eighty-nine".