444432561 has 4 divisors (see below), whose sum is σ = 592576752. Its totient is φ = 296288372.

The previous prime is 444432559. The next prime is 444432589. The reversal of 444432561 is 165234444.

It is a happy number.

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 444432561 - 2¹ = 444432559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (444432161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74072091 + ... + 74072096.

It is an arithmetic number, because the mean of its divisors is an integer number (148144188).

Almost surely, 2^444432561 is an apocalyptic number.

It is an amenable number.

444432561 is a deficient number, since it is larger than the sum of its proper divisors (148144191).

444432561 is a wasteful number, since it uses less digits than its factorization.

444432561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148144190.

The product of its digits is 46080, while the sum is 33.

The square root of 444432561 is about 21081.5692252735. The cubic root of 444432561 is about 763.1360267342.

The spelling of 444432561 in words is "four hundred forty-four million, four hundred thirty-two thousand, five hundred sixty-one".