444225661 has 4 divisors (see below), whose sum is σ = 484609824. Its totient is φ = 403841500.

The previous prime is 444225653. The next prime is 444225667. The reversal of 444225661 is 166522444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444225661 - 2³ = 444225653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444225667) 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 3 ways as a sum of consecutive naturals, for example, 20192065 + ... + 20192086.

It is an arithmetic number, because the mean of its divisors is an integer number (121152456).

Almost surely, 2^444225661 is an apocalyptic number.

It is an amenable number.

444225661 is a deficient number, since it is larger than the sum of its proper divisors (40384163).

444225661 is a wasteful number, since it uses less digits than its factorization.

444225661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40384162.

The product of its digits is 46080, while the sum is 34.

The square root of 444225661 is about 21076.6615240650. The cubic root of 444225661 is about 763.0175855534.

It can be divided in two parts, 4442 and 25661, that added together give a palindrome (30103).

The spelling of 444225661 in words is "four hundred forty-four million, two hundred twenty-five thousand, six hundred sixty-one".