1311230654556 has 12 divisors (see below), whose sum is σ = 3059538193992. Its totient is φ = 437076884848.

The previous prime is 1311230654549. The next prime is 1311230654621. The reversal of 1311230654556 is 6554560321131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 54634610595 + ... + 54634610618.

It is an arithmetic number, because the mean of its divisors is an integer number (254961516166).

Almost surely, 2^{1311230654556} is an apocalyptic number.

It is an amenable number.

1311230654556 is an abundant number, since it is smaller than the sum of its proper divisors (1748307539436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311230654556 is a wasteful number, since it uses less digits than its factorization.

1311230654556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109269221220 (or 109269221218 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 1311230654556 its reverse (6554560321131), we get a palindrome (7865790975687).

The spelling of 1311230654556 in words is "one trillion, three hundred eleven billion, two hundred thirty million, six hundred fifty-four thousand, five hundred fifty-six".