1311631630641 has 16 divisors (see below), whose sum is σ = 1943187840000. Its totient is φ = 874407646224.

The previous prime is 1311631630627. The next prime is 1311631630643. The reversal of 1311631630641 is 1460361361131.

1311631630641 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 6 + 3 + 1 + 6 + 3 + 0 + 641 = 666.

It is not a de Polignac number, because 1311631630641 - 2⁷ = 1311631630513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311631630596 and 1311631630605.

It is not an unprimeable number, because it can be changed into a prime (1311631630643) 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, 1606615 + ... + 2281331.

It is an arithmetic number, because the mean of its divisors is an integer number (121449240000).

Almost surely, 2^{1311631630641} is an apocalyptic number.

It is an amenable number.

1311631630641 is a deficient number, since it is larger than the sum of its proper divisors (631556209359).

1311631630641 is an equidigital number, since it uses as much as digits as its factorization.

1311631630641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746725 (or 746719 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

Adding to 1311631630641 its reverse (1460361361131), we get a palindrome (2771992991772).

The spelling of 1311631630641 in words is "one trillion, three hundred eleven billion, six hundred thirty-one million, six hundred thirty thousand, six hundred forty-one".