40004444405 has 4 divisors (see below), whose sum is σ = 48005333292. Its totient is φ = 32003555520.

The previous prime is 40004444401. The next prime is 40004444443. The reversal of 40004444405 is 50444440004.

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 6158011729 + 33846432676 = 78473^2 + 183974^2 .

It is not a de Polignac number, because 40004444405 - 2² = 40004444401 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 (40004444401) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4000444436 + ... + 4000444445.

It is an arithmetic number, because the mean of its divisors is an integer number (12001333323).

Almost surely, 2^40004444405 is an apocalyptic number.

It is an amenable number.

40004444405 is a deficient number, since it is larger than the sum of its proper divisors (8000888887).

40004444405 is an equidigital number, since it uses as much as digits as its factorization.

40004444405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000888886.

The product of its (nonzero) digits is 20480, while the sum is 29.

Adding to 40004444405 its reverse (50444440004), we get a palindrome (90448884409).

The spelling of 40004444405 in words is "forty billion, four million, four hundred forty-four thousand, four hundred five".