41340445561 has 2 divisors, whose sum is σ = 41340445562. Its totient is φ = 41340445560.

The previous prime is 41340445519. The next prime is 41340445583. The reversal of 41340445561 is 16554404314.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41127840000 + 212605561 = 202800^2 + 14581^2 .

It is a cyclic number.

It is not a de Polignac number, because 41340445561 - 2²⁷ = 41206227833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41340445561.

It is not a weakly prime, because it can be changed into another prime (41340445501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20670222780 + 20670222781.

It is an arithmetic number, because the mean of its divisors is an integer number (20670222781).

Almost surely, 2^41340445561 is an apocalyptic number.

It is an amenable number.

41340445561 is a deficient number, since it is larger than the sum of its proper divisors (1).

41340445561 is an equidigital number, since it uses as much as digits as its factorization.

41340445561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 41340445561 its reverse (16554404314), we get a palindrome (57894849875).

The spelling of 41340445561 in words is "forty-one billion, three hundred forty million, four hundred forty-five thousand, five hundred sixty-one".