11278711289 has 4 divisors (see below), whose sum is σ = 11283334260. Its totient is φ = 11274088320.

The previous prime is 11278711267. The next prime is 11278711303. The reversal of 11278711289 is 98211787211.

It is a happy number.

11278711289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98211787211 = 12583 ⋅7805117.

It can be written as a sum of positive squares in 2 ways, for example, as 453349264 + 10825362025 = 21292^2 + 104045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11278711289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11278711219) 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 in 3 ways as a sum of consecutive naturals, for example, 2307824 + ... + 2312705.

It is an arithmetic number, because the mean of its divisors is an integer number (2820833565).

Almost surely, 2^11278711289 is an apocalyptic number.

It is an amenable number.

11278711289 is a deficient number, since it is larger than the sum of its proper divisors (4622971).

11278711289 is an equidigital number, since it uses as much as digits as its factorization.

11278711289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622970.

The product of its digits is 112896, while the sum is 47.

The spelling of 11278711289 in words is "eleven billion, two hundred seventy-eight million, seven hundred eleven thousand, two hundred eighty-nine".