41443771409 has 2 divisors, whose sum is σ = 41443771410. Its totient is φ = 41443771408.

The previous prime is 41443771387. The next prime is 41443771459. The reversal of 41443771409 is 90417734414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35911387009 + 5532384400 = 189503^2 + 74380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41443771409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 41443771409.

It is not a weakly prime, because it can be changed into another prime (41443771459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20721885704 + 20721885705.

It is an arithmetic number, because the mean of its divisors is an integer number (20721885705).

Almost surely, 2^41443771409 is an apocalyptic number.

It is an amenable number.

41443771409 is a deficient number, since it is larger than the sum of its proper divisors (1).

41443771409 is an equidigital number, since it uses as much as digits as its factorization.

41443771409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 41443771409 in words is "forty-one billion, four hundred forty-three million, seven hundred seventy-one thousand, four hundred nine".