444435743981 has 2 divisors, whose sum is σ = 444435743982. Its totient is φ = 444435743980.

The previous prime is 444435743959. The next prime is 444435744013. The reversal of 444435743981 is 189347534444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265091116900 + 179344627081 = 514870^2 + 423491^2 .

It is a cyclic number.

It is not a de Polignac number, because 444435743981 - 2¹⁴ = 444435727597 is a prime.

It is a super-2 number, since 2×444435743981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444435743281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222217871990 + 222217871991.

It is an arithmetic number, because the mean of its divisors is an integer number (222217871991).

Almost surely, 2^444435743981 is an apocalyptic number.

It is an amenable number.

444435743981 is a deficient number, since it is larger than the sum of its proper divisors (1).

444435743981 is an equidigital number, since it uses as much as digits as its factorization.

444435743981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 56.

The spelling of 444435743981 in words is "four hundred forty-four billion, four hundred thirty-five million, seven hundred forty-three thousand, nine hundred eighty-one".