11268381989 has 2 divisors, whose sum is σ = 11268381990. Its totient is φ = 11268381988.

The previous prime is 11268381977. The next prime is 11268381997. The reversal of 11268381989 is 98918386211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10809137089 + 459244900 = 103967^2 + 21430^2 .

It is a cyclic number.

It is not a de Polignac number, because 11268381989 - 2²⁴ = 11251604773 is a prime.

It is a super-2 number, since 2×11268381989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11268386989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5634190994 + 5634190995.

It is an arithmetic number, because the mean of its divisors is an integer number (5634190995).

Almost surely, 2^11268381989 is an apocalyptic number.

It is an amenable number.

11268381989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11268381989 is an equidigital number, since it uses as much as digits as its factorization.

11268381989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 56.

The spelling of 11268381989 in words is "eleven billion, two hundred sixty-eight million, three hundred eighty-one thousand, nine hundred eighty-nine".