40408440073 has 2 divisors, whose sum is σ = 40408440074. Its totient is φ = 40408440072.

The previous prime is 40408440067. The next prime is 40408440091. The reversal of 40408440073 is 37004480404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28362938569 + 12045501504 = 168413^2 + 109752^2 .

It is a cyclic number.

It is not a de Polignac number, because 40408440073 - 2¹³ = 40408431881 is a prime.

It is not a weakly prime, because it can be changed into another prime (40408440053) 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, 20204220036 + 20204220037.

It is an arithmetic number, because the mean of its divisors is an integer number (20204220037).

Almost surely, 2^40408440073 is an apocalyptic number.

It is an amenable number.

40408440073 is a deficient number, since it is larger than the sum of its proper divisors (1).

40408440073 is an equidigital number, since it uses as much as digits as its factorization.

40408440073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 34.

The spelling of 40408440073 in words is "forty billion, four hundred eight million, four hundred forty thousand, seventy-three".