40004444421 has 12 divisors (see below), whose sum is σ = 61183268172. Its totient is φ = 25100827776.

The previous prime is 40004444401. The next prime is 40004444443. The reversal of 40004444421 is 12444440004.

It can be written as a sum of positive squares in 2 ways, for example, as 10876195521 + 29128248900 = 104289^2 + 170670^2 .

It is not a de Polignac number, because 40004444421 - 2¹⁰ = 40004443397 is a prime.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130733326 + ... + 130733631.

It is an arithmetic number, because the mean of its divisors is an integer number (5098605681).

Almost surely, 2^40004444421 is an apocalyptic number.

It is an amenable number.

40004444421 is a deficient number, since it is larger than the sum of its proper divisors (21178823751).

40004444421 is a wasteful number, since it uses less digits than its factorization.

40004444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261466980 (or 261466977 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 40004444421 its reverse (12444440004), we get a palindrome (52448884425).

The spelling of 40004444421 in words is "forty billion, four million, four hundred forty-four thousand, four hundred twenty-one".