43036245509 has 2 divisors, whose sum is σ = 43036245510. Its totient is φ = 43036245508.

The previous prime is 43036245491. The next prime is 43036245563. The reversal of 43036245509 is 90554263034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24295456900 + 18740788609 = 155870^2 + 136897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43036245509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43036245209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21518122754 + 21518122755.

It is an arithmetic number, because the mean of its divisors is an integer number (21518122755).

Almost surely, 2^43036245509 is an apocalyptic number.

It is an amenable number.

43036245509 is a deficient number, since it is larger than the sum of its proper divisors (1).

43036245509 is an equidigital number, since it uses as much as digits as its factorization.

43036245509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 43036245509 in words is "forty-three billion, thirty-six million, two hundred forty-five thousand, five hundred nine".