11501063505509 has 2 divisors, whose sum is σ = 11501063505510. Its totient is φ = 11501063505508.

The previous prime is 11501063505469. The next prime is 11501063505539. The reversal of 11501063505509 is 90550536010511.

11501063505509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7065734841025 + 4435328664484 = 2658145^2 + 2106022^2 .

It is a cyclic number.

It is not a de Polignac number, because 11501063505509 - 2¹⁶ = 11501063439973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11501063505539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750531752754 + 5750531752755.

It is an arithmetic number, because the mean of its divisors is an integer number (5750531752755).

Almost surely, 2^{11501063505509} is an apocalyptic number.

It is an amenable number.

11501063505509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11501063505509 is an equidigital number, since it uses as much as digits as its factorization.

11501063505509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101250, while the sum is 41.

The spelling of 11501063505509 in words is "eleven trillion, five hundred one billion, sixty-three million, five hundred five thousand, five hundred nine".