43620435242509 has 2 divisors, whose sum is σ = 43620435242510. Its totient is φ = 43620435242508.

The previous prime is 43620435242431. The next prime is 43620435242543. The reversal of 43620435242509 is 90524253402634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34060880268900 + 9559554973609 = 5836170^2 + 3091853^2 .

It is a cyclic number.

It is not a de Polignac number, because 43620435242509 - 2¹¹ = 43620435240461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43620435242009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21810217621254 + 21810217621255.

It is an arithmetic number, because the mean of its divisors is an integer number (21810217621255).

Almost surely, 2^{43620435242509} is an apocalyptic number.

It is an amenable number.

43620435242509 is a deficient number, since it is larger than the sum of its proper divisors (1).

43620435242509 is an equidigital number, since it uses as much as digits as its factorization.

43620435242509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 49.

The spelling of 43620435242509 in words is "forty-three trillion, six hundred twenty billion, four hundred thirty-five million, two hundred forty-two thousand, five hundred nine".