1117821233789 has 8 divisors (see below), whose sum is σ = 1236342820440. Its totient is φ = 1003947552576.

The previous prime is 1117821233783. The next prime is 1117821233797. The reversal of 1117821233789 is 9873321287111.

It can be written as a sum of positive squares in 4 ways, for example, as 510603139225 + 607218094564 = 714565^2 + 779242^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1117821233789 - 2⁴ = 1117821233773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1117821233789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117821233783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161975854 + ... + 1161976815.

It is an arithmetic number, because the mean of its divisors is an integer number (154542852555).

Almost surely, 2^{1117821233789} is an apocalyptic number.

It is an amenable number.

1117821233789 is a deficient number, since it is larger than the sum of its proper divisors (118521586651).

1117821233789 is a wasteful number, since it uses less digits than its factorization.

1117821233789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323952719.

The product of its digits is 1016064, while the sum is 53.

The spelling of 1117821233789 in words is "one trillion, one hundred seventeen billion, eight hundred twenty-one million, two hundred thirty-three thousand, seven hundred eighty-nine".