40717318181 has 2 divisors, whose sum is σ = 40717318182. Its totient is φ = 40717318180.

The previous prime is 40717318153. The next prime is 40717318219. The reversal of 40717318181 is 18181371704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40701045025 + 16273156 = 201745^2 + 4034^2 .

It is a cyclic number.

It is not a de Polignac number, because 40717318181 - 2²² = 40713123877 is a prime.

It is a super-2 number, since 2×40717318181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40717918181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20358659090 + 20358659091.

It is an arithmetic number, because the mean of its divisors is an integer number (20358659091).

Almost surely, 2^40717318181 is an apocalyptic number.

It is an amenable number.

40717318181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40717318181 is an equidigital number, since it uses as much as digits as its factorization.

40717318181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 41.

Adding to 40717318181 its reverse (18181371704), we get a palindrome (58898689885).

The spelling of 40717318181 in words is "forty billion, seven hundred seventeen million, three hundred eighteen thousand, one hundred eighty-one".