1311130643446 has 16 divisors (see below), whose sum is σ = 2134148064048. Its totient is φ = 600517850400.

The previous prime is 1311130643441. The next prime is 1311130643447. The reversal of 1311130643446 is 6443460311131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311130643441) 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, 192470265 + ... + 192477076.

It is an arithmetic number, because the mean of its divisors is an integer number (133384254003).

Almost surely, 2^{1311130643446} is an apocalyptic number.

1311130643446 is a deficient number, since it is larger than the sum of its proper divisors (823017420602).

1311130643446 is a wasteful number, since it uses less digits than its factorization.

1311130643446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384947487.

The product of its (nonzero) digits is 62208, while the sum is 37.

Adding to 1311130643446 its reverse (6443460311131), we get a palindrome (7754590954577).

The spelling of 1311130643446 in words is "one trillion, three hundred eleven billion, one hundred thirty million, six hundred forty-three thousand, four hundred forty-six".