400004404445 has 4 divisors (see below), whose sum is σ = 480005285340. Its totient is φ = 320003523552.

The previous prime is 400004404417. The next prime is 400004404529. The reversal of 400004404445 is 544404400004.

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 168025388281 + 231979016164 = 409909^2 + 481642^2 .

It is a cyclic number.

It is not a de Polignac number, because 400004404445 - 2¹⁸ = 400004142301 is a prime.

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, 40000440440 + ... + 40000440449.

It is an arithmetic number, because the mean of its divisors is an integer number (120001321335).

Almost surely, 2^400004404445 is an apocalyptic number.

It is an amenable number.

400004404445 is a deficient number, since it is larger than the sum of its proper divisors (80000880895).

400004404445 is an equidigital number, since it uses as much as digits as its factorization.

400004404445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80000880894.

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

Adding to 400004404445 its reverse (544404400004), we get a palindrome (944408804449).

The spelling of 400004404445 in words is "four hundred billion, four million, four hundred four thousand, four hundred forty-five".