44405021405 has 4 divisors (see below), whose sum is σ = 53286025692. Its totient is φ = 35524017120.

The previous prime is 44405021387. The next prime is 44405021413. The reversal of 44405021405 is 50412050444.

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 11780714521 + 32624306884 = 108539^2 + 180622^2 .

It is not a de Polignac number, because 44405021405 - 2¹⁶ = 44404955869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4440502136 + ... + 4440502145.

It is an arithmetic number, because the mean of its divisors is an integer number (13321506423).

Almost surely, 2^44405021405 is an apocalyptic number.

It is an amenable number.

44405021405 is a deficient number, since it is larger than the sum of its proper divisors (8881004287).

44405021405 is an equidigital number, since it uses as much as digits as its factorization.

44405021405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881004286.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 44405021405 its reverse (50412050444), we get a palindrome (94817071849).

The spelling of 44405021405 in words is "forty-four billion, four hundred five million, twenty-one thousand, four hundred five".