444444444444445 has 4 divisors (see below), whose sum is σ = 533333333333340. Its totient is φ = 355555555555552.

The previous prime is 444444444444421. The next prime is 444444444444461. The reversal of 444444444444445 is 544444444444444.

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

It can be written as a sum of positive squares in 2 ways, for example, as 127144432395556 + 317300012048889 = 11275834^2 + 17812917^2 .

It is a cyclic number.

It is not a de Polignac number, because 444444444444445 - 2²¹ = 444444442347293 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44444444444440 + ... + 44444444444449.

It is an arithmetic number, because the mean of its divisors is an integer number (133333333333335).

Almost surely, 2^{444444444444445} is an apocalyptic number.

It is an amenable number.

444444444444445 is a deficient number, since it is larger than the sum of its proper divisors (88888888888895).

444444444444445 is an equidigital number, since it uses as much as digits as its factorization.

444444444444445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88888888888894.

The product of its digits is 1342177280, while the sum is 61.

Adding to 444444444444445 its reverse (544444444444444), we get a palindrome (988888888888889).

Subtracting 444444444444445 from its reverse (544444444444444), we obtain a palindrome (99999999999999).

It can be divided in two parts, 4444444444 and 44445, that added together give a square (4444488889 = 66667²).

The spelling of 444444444444445 in words is "four hundred forty-four trillion, four hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-five".