1228154368789 has 4 divisors (see below), whose sum is σ = 1235015566560. Its totient is φ = 1221293171020.

The previous prime is 1228154368781. The next prime is 1228154368843. The reversal of 1228154368789 is 9878634518221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1228154368789 - 2³ = 1228154368781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1228154368789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228154368781) 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 3 ways as a sum of consecutive naturals, for example, 3430598617 + ... + 3430598974.

It is an arithmetic number, because the mean of its divisors is an integer number (308753891640).

Almost surely, 2^{1228154368789} is an apocalyptic number.

It is an amenable number.

1228154368789 is a deficient number, since it is larger than the sum of its proper divisors (6861197771).

1228154368789 is an equidigital number, since it uses as much as digits as its factorization.

1228154368789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861197770.

The product of its digits is 46448640, while the sum is 64.

The spelling of 1228154368789 in words is "one trillion, two hundred twenty-eight billion, one hundred fifty-four million, three hundred sixty-eight thousand, seven hundred eighty-nine".