1311646317869 has 8 divisors (see below), whose sum is σ = 1389563838720. Its totient is φ = 1233813447616.

The previous prime is 1311646317841. The next prime is 1311646317881. The reversal of 1311646317869 is 9687136461131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311646317869 is a prime.

It is a super-2 number, since 2×1311646317869² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311646317809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21130739 + ... + 21192720.

It is an arithmetic number, because the mean of its divisors is an integer number (173695479840).

Almost surely, 2^{1311646317869} is an apocalyptic number.

It is an amenable number.

1311646317869 is a deficient number, since it is larger than the sum of its proper divisors (77917520851).

1311646317869 is a wasteful number, since it uses less digits than its factorization.

1311646317869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42325299.

The product of its digits is 3919104, while the sum is 56.

The spelling of 1311646317869 in words is "one trillion, three hundred eleven billion, six hundred forty-six million, three hundred seventeen thousand, eight hundred sixty-nine".