44444444445 has 60 divisors (see below), whose sum is σ = 84633198804. Its totient is φ = 22309309440.

The previous prime is 44444444441. The next prime is 44444444497. The reversal of 44444444445 is 54444444444.

It can be written as a sum of positive squares in 6 ways, for example, as 9733400964 + 34711043481 = 98658^2 + 186309^2 .

It is not a de Polignac number, because 44444444445 - 2² = 44444444441 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 44444444445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44444444441) by changing a digit.

It is a Kaprekar number, because its square (1975308642024691358025) can be partitioned into two parts whose sum is 44444444445.

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 59 ways as a sum of consecutive naturals, for example, 72816 + ... + 306905.

Almost surely, 2^44444444445 is an apocalyptic number.

44444444445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44444444445 is a deficient number, since it is larger than the sum of its proper divisors (40188754359).

44444444445 is a wasteful number, since it uses less digits than its factorization.

44444444445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379772 (or 379746 counting only the distinct ones).

The product of its digits is 5242880, while the sum is 45.

Adding to 44444444445 its reverse (54444444444), we get a palindrome (98888888889).

Subtracting 44444444445 from its reverse (54444444444), we obtain a palindrome (9999999999).

The spelling of 44444444445 in words is "forty-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-five".