1311423323646 has 16 divisors (see below), whose sum is σ = 2642868379008. Its totient is φ = 433804152600.

The previous prime is 1311423323621. The next prime is 1311423323659. The reversal of 1311423323646 is 6463233241131.

It is a super-2 number, since 2×1311423323646² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834237970 + ... + 834239541.

It is an arithmetic number, because the mean of its divisors is an integer number (165179273688).

Almost surely, 2^{1311423323646} is an apocalyptic number.

1311423323646 is an abundant number, since it is smaller than the sum of its proper divisors (1331445055362).

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

1311423323646 is a wasteful number, since it uses less digits than its factorization.

1311423323646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668477647.

The product of its digits is 186624, while the sum is 39.

Adding to 1311423323646 its reverse (6463233241131), we get a palindrome (7774656564777).

The spelling of 1311423323646 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, three hundred twenty-three thousand, six hundred forty-six".