11418889176509 has 2 divisors, whose sum is σ = 11418889176510. Its totient is φ = 11418889176508.

The previous prime is 11418889176413. The next prime is 11418889176589. The reversal of 11418889176509 is 90567198881411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10425633765625 + 993255410884 = 3228875^2 + 996622^2 .

It is a cyclic number.

It is not a de Polignac number, because 11418889176509 - 2²⁸ = 11418620741053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11418889176589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5709444588254 + 5709444588255.

It is an arithmetic number, because the mean of its divisors is an integer number (5709444588255).

Almost surely, 2^{11418889176509} is an apocalyptic number.

It is an amenable number.

11418889176509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11418889176509 is an equidigital number, since it uses as much as digits as its factorization.

11418889176509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 68.

The spelling of 11418889176509 in words is "eleven trillion, four hundred eighteen billion, eight hundred eighty-nine million, one hundred seventy-six thousand, five hundred nine".