1311042454550 has 144 divisors (see below), whose sum is σ = 2695266420480. Its totient is φ = 473493746880.

The previous prime is 1311042454549. The next prime is 1311042454559. The reversal of 1311042454550 is 554542401131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311042454550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311042454559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 117481871 + ... + 117493029.

It is an arithmetic number, because the mean of its divisors is an integer number (18717127920).

Almost surely, 2^{1311042454550} is an apocalyptic number.

1311042454550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311042454550 is an abundant number, since it is smaller than the sum of its proper divisors (1384223965930).

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

1311042454550 is a wasteful number, since it uses less digits than its factorization.

1311042454550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11515 (or 11491 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 1311042454550 its reverse (554542401131), we get a palindrome (1865584855681).

The spelling of 1311042454550 in words is "one trillion, three hundred eleven billion, forty-two million, four hundred fifty-four thousand, five hundred fifty".