1111234556789 has 6 divisors (see below), whose sum is σ = 1292660606934. Its totient is φ = 952486762920.

The previous prime is 1111234556777. The next prime is 1111234556813. The reversal of 1111234556789 is 9876554321111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 626999499889 + 484235056900 = 791833^2 + 695870^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1111234556789 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1111234556789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111234556989) 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 in 5 ways as a sum of consecutive naturals, for example, 11339128082 + ... + 11339128179.

It is an arithmetic number, because the mean of its divisors is an integer number (215443434489).

Almost surely, 2^{1111234556789} is an apocalyptic number.

It is an amenable number.

1111234556789 is a deficient number, since it is larger than the sum of its proper divisors (181426050145).

1111234556789 is an equidigital number, since it uses as much as digits as its factorization.

1111234556789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22678256275 (or 22678256268 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 53.

The spelling of 1111234556789 in words is "one trillion, one hundred eleven billion, two hundred thirty-four million, five hundred fifty-six thousand, seven hundred eighty-nine".