40065430217 has 2 divisors, whose sum is σ = 40065430218. Its totient is φ = 40065430216.

The previous prime is 40065430151. The next prime is 40065430231. The reversal of 40065430217 is 71203456004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26890752256 + 13174677961 = 163984^2 + 114781^2 .

It is a cyclic number.

It is not a de Polignac number, because 40065430217 - 2⁸ = 40065429961 is a prime.

It is not a weakly prime, because it can be changed into another prime (40065430277) 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, 20032715108 + 20032715109.

It is an arithmetic number, because the mean of its divisors is an integer number (20032715109).

Almost surely, 2^40065430217 is an apocalyptic number.

It is an amenable number.

40065430217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40065430217 is an equidigital number, since it uses as much as digits as its factorization.

40065430217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 40065430217 in words is "forty billion, sixty-five million, four hundred thirty thousand, two hundred seventeen".