444405561 has 16 divisors (see below), whose sum is σ = 599249664. Its totient is φ = 292927184.

The previous prime is 444405547. The next prime is 444405581. The reversal of 444405561 is 165504444.

It is a cyclic number.

It is not a de Polignac number, because 444405561 - 2⁵ = 444405529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (444405581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218230 + ... + 220256.

It is an arithmetic number, because the mean of its divisors is an integer number (37453104).

Almost surely, 2^444405561 is an apocalyptic number.

It is an amenable number.

444405561 is a deficient number, since it is larger than the sum of its proper divisors (154844103).

444405561 is a wasteful number, since it uses less digits than its factorization.

444405561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 444405561 is about 21080.9288457601. The cubic root of 444405561 is about 763.1205725035.

The spelling of 444405561 in words is "four hundred forty-four million, four hundred five thousand, five hundred sixty-one".