444081861608447 has 4 divisors (see below), whose sum is σ = 444103930001160. Its totient is φ = 444059793215736.

The previous prime is 444081861608443. The next prime is 444081861608449. The reversal of 444081861608447 is 744806168180444.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 444081861608447 - 2² = 444081861608443 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 (444081861608443) 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, 11034166172 + ... + 11034206417.

It is an arithmetic number, because the mean of its divisors is an integer number (111025982500290).

Almost surely, 2^{444081861608447} is an apocalyptic number.

444081861608447 is a deficient number, since it is larger than the sum of its proper divisors (22068392713).

444081861608447 is a wasteful number, since it uses less digits than its factorization.

444081861608447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22068392712.

The product of its (nonzero) digits is 132120576, while the sum is 65.

The spelling of 444081861608447 in words is "four hundred forty-four trillion, eighty-one billion, eight hundred sixty-one million, six hundred eight thousand, four hundred forty-seven".