40440400043 has 2 divisors, whose sum is σ = 40440400044. Its totient is φ = 40440400042.

The previous prime is 40440400001. The next prime is 40440400073. The reversal of 40440400043 is 34000404404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40440400043 - 2¹⁰ = 40440399019 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 40440399991 and 40440400018.

It is not a weakly prime, because it can be changed into another prime (40440400073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220200021 + 20220200022.

It is an arithmetic number, because the mean of its divisors is an integer number (20220200022).

Almost surely, 2^40440400043 is an apocalyptic number.

40440400043 is a deficient number, since it is larger than the sum of its proper divisors (1).

40440400043 is an equidigital number, since it uses as much as digits as its factorization.

40440400043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 40440400043 its reverse (34000404404), we get a palindrome (74440804447).

The spelling of 40440400043 in words is "forty billion, four hundred forty million, four hundred thousand, forty-three".