1311646317872 has 80 divisors (see below), whose sum is σ = 2801013937920. Its totient is φ = 590061638400.

The previous prime is 1311646317841. The next prime is 1311646317881. The reversal of 1311646317872 is 2787136461131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311646317872.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8523629 + ... + 8676147.

It is an arithmetic number, because the mean of its divisors is an integer number (35012674224).

Almost surely, 2^{1311646317872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311646317872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400506968960).

1311646317872 is an abundant number, since it is smaller than the sum of its proper divisors (1489367620048).

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

1311646317872 is a wasteful number, since it uses less digits than its factorization.

1311646317872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153042 (or 153036 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The spelling of 1311646317872 in words is "one trillion, three hundred eleven billion, six hundred forty-six million, three hundred seventeen thousand, eight hundred seventy-two".