11133557789 has 4 divisors (see below), whose sum is σ = 11195069340. Its totient is φ = 11072046240.

The previous prime is 11133557777. The next prime is 11133557791. The reversal of 11133557789 is 98775533111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 341880100 + 10791677689 = 18490^2 + 103883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11133557789 is a prime.

It is a super-2 number, since 2×11133557789² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133557759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30755504 + ... + 30755865.

It is an arithmetic number, because the mean of its divisors is an integer number (2798767335).

Almost surely, 2^11133557789 is an apocalyptic number.

It is an amenable number.

11133557789 is a deficient number, since it is larger than the sum of its proper divisors (61511551).

11133557789 is an equidigital number, since it uses as much as digits as its factorization.

11133557789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61511550.

The product of its digits is 793800, while the sum is 50.

The spelling of 11133557789 in words is "eleven billion, one hundred thirty-three million, five hundred fifty-seven thousand, seven hundred eighty-nine".