40404040399 has 2 divisors, whose sum is σ = 40404040400. Its totient is φ = 40404040398.

The previous prime is 40404040387. The next prime is 40404040451. The reversal of 40404040399 is 99304040404.

40404040399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40404040399 - 2⁹ = 40404039887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40404046399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202020199 + 20202020200.

It is an arithmetic number, because the mean of its divisors is an integer number (20202020200).

Almost surely, 2^40404040399 is an apocalyptic number.

40404040399 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404040399 is an equidigital number, since it uses as much as digits as its factorization.

40404040399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 40404040399 in words is "forty billion, four hundred four million, forty thousand, three hundred ninety-nine".