40400400043 has 2 divisors, whose sum is σ = 40400400044. Its totient is φ = 40400400042.

The previous prime is 40400399987. The next prime is 40400400077. The reversal of 40400400043 is 34000400404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40400400043 - 2¹⁷ = 40400268971 is a prime.

It is not a weakly prime, because it can be changed into another prime (40400400143) 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 as a sum of consecutive naturals, namely, 20200200021 + 20200200022.

It is an arithmetic number, because the mean of its divisors is an integer number (20200200022).

Almost surely, 2^40400400043 is an apocalyptic number.

40400400043 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400400043 is an equidigital number, since it uses as much as digits as its factorization.

40400400043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 40400400043 its reverse (34000400404), we get a palindrome (74400800447).

The spelling of 40400400043 in words is "forty billion, four hundred million, four hundred thousand, forty-three".