1311045664611 has 4 divisors (see below), whose sum is σ = 1748060886152. Its totient is φ = 874030443072.

The previous prime is 1311045664603. The next prime is 1311045664613. The reversal of 1311045664611 is 1164665401131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1311045664611 - 2³ = 1311045664603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311045664611.

It is not an unprimeable number, because it can be changed into a prime (1311045664613) 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 3 ways as a sum of consecutive naturals, for example, 218507610766 + ... + 218507610771.

It is an arithmetic number, because the mean of its divisors is an integer number (437015221538).

Almost surely, 2^{1311045664611} is an apocalyptic number.

1311045664611 is a deficient number, since it is larger than the sum of its proper divisors (437015221541).

1311045664611 is an equidigital number, since it uses as much as digits as its factorization.

1311045664611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437015221540.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 1311045664611 in words is "one trillion, three hundred eleven billion, forty-five million, six hundred sixty-four thousand, six hundred eleven".