41400865817 has 2 divisors, whose sum is σ = 41400865818. Its totient is φ = 41400865816.

The previous prime is 41400865777. The next prime is 41400865853. The reversal of 41400865817 is 71856800414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36531059161 + 4869806656 = 191131^2 + 69784^2 .

It is a cyclic number.

It is not a de Polignac number, because 41400865817 - 2³⁴ = 24220996633 is a prime.

It is not a weakly prime, because it can be changed into another prime (41400862817) 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, 20700432908 + 20700432909.

It is an arithmetic number, because the mean of its divisors is an integer number (20700432909).

Almost surely, 2^41400865817 is an apocalyptic number.

It is an amenable number.

41400865817 is a deficient number, since it is larger than the sum of its proper divisors (1).

41400865817 is an equidigital number, since it uses as much as digits as its factorization.

41400865817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 41400865817 in words is "forty-one billion, four hundred million, eight hundred sixty-five thousand, eight hundred seventeen".