1311305305664 has 28 divisors (see below), whose sum is σ = 2603003020044. Its totient is φ = 655430529024.

The previous prime is 1311305305643. The next prime is 1311305305697. The reversal of 1311305305664 is 4665035031131.

It can be written as a sum of positive squares in 2 ways, for example, as 737056590400 + 574248715264 = 858520^2 + 757792^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280217 + ... + 3658200.

It is an arithmetic number, because the mean of its divisors is an integer number (92964393573).

Almost surely, 2^{1311305305664} is an apocalyptic number.

It is an amenable number.

1311305305664 is a deficient number, since it is larger than the sum of its proper divisors (1291697714380).

1311305305664 is an equidigital number, since it uses as much as digits as its factorization.

1311305305664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941382 (or 6941372 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 1311305305664 in words is "one trillion, three hundred eleven billion, three hundred five million, three hundred five thousand, six hundred sixty-four".