11328538662509 has 2 divisors, whose sum is σ = 11328538662510. Its totient is φ = 11328538662508.

The previous prime is 11328538662499. The next prime is 11328538662521. The reversal of 11328538662509 is 90526683582311.

11328538662509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6407084813284 + 4921453849225 = 2531222^2 + 2218435^2 .

It is a cyclic number.

It is not a de Polignac number, because 11328538662509 - 2²⁴ = 11328521885293 is a prime.

It is a super-2 number, since 2×11328538662509² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11328538668509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5664269331254 + 5664269331255.

It is an arithmetic number, because the mean of its divisors is an integer number (5664269331255).

Almost surely, 2^{11328538662509} is an apocalyptic number.

It is an amenable number.

11328538662509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11328538662509 is an equidigital number, since it uses as much as digits as its factorization.

11328538662509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 11328538662509 in words is "eleven trillion, three hundred twenty-eight billion, five hundred thirty-eight million, six hundred sixty-two thousand, five hundred nine".