1311241465556 has 96 divisors (see below), whose sum is σ = 2538610163712. Its totient is φ = 587678826240.

The previous prime is 1311241465531. The next prime is 1311241465559. The reversal of 1311241465556 is 6555641421131.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311241465559) 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 31 ways as a sum of consecutive naturals, for example, 815955305 + ... + 815956911.

It is an arithmetic number, because the mean of its divisors is an integer number (26443855872).

Almost surely, 2^{1311241465556} is an apocalyptic number.

It is an amenable number.

1311241465556 is a deficient number, since it is larger than the sum of its proper divisors (1227368698156).

1311241465556 is a wasteful number, since it uses less digits than its factorization.

1311241465556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2587 counting only the distinct ones).

The product of its digits is 432000, while the sum is 44.

Adding to 1311241465556 its reverse (6555641421131), we get a palindrome (7866882886687).

The spelling of 1311241465556 in words is "one trillion, three hundred eleven billion, two hundred forty-one million, four hundred sixty-five thousand, five hundred fifty-six".