444445555557 has 8 divisors (see below), whose sum is σ = 592708782976. Its totient is φ = 296239682592.

The previous prime is 444445555529. The next prime is 444445555571. The reversal of 444445555557 is 755555544444.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 444445555557 - 2⁷ = 444445555429 is a prime.

It is the 666668-th Hogben number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 444445555497 and 444445555506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444445555457) by changing a digit.

It is a nontrivial repunit in base 666667.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14320528 + ... + 14351529.

It is an arithmetic number, because the mean of its divisors is an integer number (74088597872).

Almost surely, 2^444445555557 is an apocalyptic number.

It is an amenable number.

444445555557 is a deficient number, since it is larger than the sum of its proper divisors (148263227419).

444445555557 is a wasteful number, since it uses less digits than its factorization.

444445555557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28677227.

The product of its digits is 112000000, while the sum is 57.

The spelling of 444445555557 in words is "four hundred forty-four billion, four hundred forty-five million, five hundred fifty-five thousand, five hundred fifty-seven".