11662815389 has 2 divisors, whose sum is σ = 11662815390. Its totient is φ = 11662815388.

The previous prime is 11662815377. The next prime is 11662815397. The reversal of 11662815389 is 98351826611.

11662815389 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., 5854851289 + 5807964100 = 76517^2 + 76210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11662815389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11662815589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831407694 + 5831407695.

It is an arithmetic number, because the mean of its divisors is an integer number (5831407695).

Almost surely, 2^11662815389 is an apocalyptic number.

It is an amenable number.

11662815389 is a deficient number, since it is larger than the sum of its proper divisors (1).

11662815389 is an equidigital number, since it uses as much as digits as its factorization.

11662815389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 50.

The spelling of 11662815389 in words is "eleven billion, six hundred sixty-two million, eight hundred fifteen thousand, three hundred eighty-nine".