444808040813 has 2 divisors, whose sum is σ = 444808040814. Its totient is φ = 444808040812.

The previous prime is 444808040797. The next prime is 444808040837. The reversal of 444808040813 is 318040808444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435934024009 + 8874016804 = 660253^2 + 94202^2 .

It is a cyclic number.

It is not a de Polignac number, because 444808040813 - 2⁴ = 444808040797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444808040893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222404020406 + 222404020407.

It is an arithmetic number, because the mean of its divisors is an integer number (222404020407).

Almost surely, 2^444808040813 is an apocalyptic number.

It is an amenable number.

444808040813 is a deficient number, since it is larger than the sum of its proper divisors (1).

444808040813 is an equidigital number, since it uses as much as digits as its factorization.

444808040813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393216, while the sum is 44.

The spelling of 444808040813 in words is "four hundred forty-four billion, eight hundred eight million, forty thousand, eight hundred thirteen".