1311646317871 has 16 divisors (see below), whose sum is σ = 1425463792128. Its totient is φ = 1203516468000.

The previous prime is 1311646317841. The next prime is 1311646317881. The reversal of 1311646317871 is 1787136461131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311646317871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311646317811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10793805 + ... + 10914646.

It is an arithmetic number, because the mean of its divisors is an integer number (89091487008).

Almost surely, 2^{1311646317871} is an apocalyptic number.

1311646317871 is a deficient number, since it is larger than the sum of its proper divisors (113817474257).

1311646317871 is a wasteful number, since it uses less digits than its factorization.

1311646317871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21708582.

The product of its digits is 508032, while the sum is 49.

The spelling of 1311646317871 in words is "one trillion, three hundred eleven billion, six hundred forty-six million, three hundred seventeen thousand, eight hundred seventy-one".