400044404453 has 2 divisors, whose sum is σ = 400044404454. Its totient is φ = 400044404452.

The previous prime is 400044404429. The next prime is 400044404509. The reversal of 400044404453 is 354404440004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367747642084 + 32296762369 = 606422^2 + 179713^2 .

It is a cyclic number.

It is not a de Polignac number, because 400044404453 - 2²⁶ = 399977295589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400044404423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200022202226 + 200022202227.

It is an arithmetic number, because the mean of its divisors is an integer number (200022202227).

Almost surely, 2^400044404453 is an apocalyptic number.

It is an amenable number.

400044404453 is a deficient number, since it is larger than the sum of its proper divisors (1).

400044404453 is an equidigital number, since it uses as much as digits as its factorization.

400044404453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 32.

Adding to 400044404453 its reverse (354404440004), we get a palindrome (754448844457).

The spelling of 400044404453 in words is "four hundred billion, forty-four million, four hundred four thousand, four hundred fifty-three".