13235326556509 has 2 divisors, whose sum is σ = 13235326556510. Its totient is φ = 13235326556508.

The previous prime is 13235326556483. The next prime is 13235326556567. The reversal of 13235326556509 is 90565562353231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11657765436409 + 1577561120100 = 3414347^2 + 1256010^2 .

It is a cyclic number.

It is not a de Polignac number, because 13235326556509 - 2¹³ = 13235326548317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13235326556509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13235326566509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6617663278254 + 6617663278255.

It is an arithmetic number, because the mean of its divisors is an integer number (6617663278255).

Almost surely, 2^{13235326556509} is an apocalyptic number.

It is an amenable number.

13235326556509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13235326556509 is an equidigital number, since it uses as much as digits as its factorization.

13235326556509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870000, while the sum is 55.

The spelling of 13235326556509 in words is "thirteen trillion, two hundred thirty-five billion, three hundred twenty-six million, five hundred fifty-six thousand, five hundred nine".