40731409447 has 2 divisors, whose sum is σ = 40731409448. Its totient is φ = 40731409446.

The previous prime is 40731409441. The next prime is 40731409457. The reversal of 40731409447 is 74490413704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40731409447 - 2¹⁹ = 40730885159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40731409441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20365704723 + 20365704724.

It is an arithmetic number, because the mean of its divisors is an integer number (20365704724).

Almost surely, 2^40731409447 is an apocalyptic number.

40731409447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40731409447 is an equidigital number, since it uses as much as digits as its factorization.

40731409447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 40731409447 in words is "forty billion, seven hundred thirty-one million, four hundred nine thousand, four hundred forty-seven".