1311040240443 has 6 divisors (see below), whose sum is σ = 1893724791764. Its totient is φ = 874026826956.

The previous prime is 1311040240427. The next prime is 1311040240453. The reversal of 1311040240443 is 3440420401131.

1311040240443 is a `hidden beast` number, since 131 + 10 + 40 + 2 + 40 + 443 = 666.

It is not a de Polignac number, because 1311040240443 - 2⁴ = 1311040240427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311040240403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72835568905 + ... + 72835568922.

Almost surely, 2^{1311040240443} is an apocalyptic number.

1311040240443 is a deficient number, since it is larger than the sum of its proper divisors (582684551321).

1311040240443 is a wasteful number, since it uses less digits than its factorization.

1311040240443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145671137833 (or 145671137830 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1311040240443 its reverse (3440420401131), we get a palindrome (4751460641574).

The spelling of 1311040240443 in words is "one trillion, three hundred eleven billion, forty million, two hundred forty thousand, four hundred forty-three".