1311684602944 has 63 divisors (see below), whose sum is σ = 2618181296647. Its totient is φ = 652007877248.

The previous prime is 1311684602909. The next prime is 1311684603017. The reversal of 1311684602944 is 4492064861131.

The square root of 1311684602944 is 1145288.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 2189790357 + ... + 2189790955.

Almost surely, 2^{1311684602944} is an apocalyptic number.

1311684602944 is the 1145288-th square number.

It is an amenable number.

1311684602944 is a deficient number, since it is larger than the sum of its proper divisors (1306496693703).

1311684602944 is an frugal number, since it uses more digits than its factorization.

1311684602944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

Multiplying 1311684602944 by its sum of digits (49), we get a square (64272545544256 = 8017016²).

The spelling of 1311684602944 in words is "one trillion, three hundred eleven billion, six hundred eighty-four million, six hundred two thousand, nine hundred forty-four".