40815318467069 has 2 divisors, whose sum is σ = 40815318467070. Its totient is φ = 40815318467068.

The previous prime is 40815318467041. The next prime is 40815318467081. The reversal of 40815318467069 is 96076481351804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21095768418169 + 19719550048900 = 4593013^2 + 4440670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40815318467069 is a prime.

It is a super-2 number, since 2×40815318467069² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40815318467029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20407659233534 + 20407659233535.

It is an arithmetic number, because the mean of its divisors is an integer number (20407659233535).

Almost surely, 2^{40815318467069} is an apocalyptic number.

It is an amenable number.

40815318467069 is a deficient number, since it is larger than the sum of its proper divisors (1).

40815318467069 is an equidigital number, since it uses as much as digits as its factorization.

40815318467069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 40815318467069 in words is "forty trillion, eight hundred fifteen billion, three hundred eighteen million, four hundred sixty-seven thousand, sixty-nine".