1311660107591 has 4 divisors (see below), whose sum is σ = 1311926115384. Its totient is φ = 1311394099800.

The previous prime is 1311660107477. The next prime is 1311660107669. The reversal of 1311660107591 is 1957010661131.

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

It is a cyclic number.

It is not a de Polignac number, because 1311660107591 - 2¹⁰ = 1311660106567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311660167591) 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, 132996500 + ... + 133006361.

It is an arithmetic number, because the mean of its divisors is an integer number (327981528846).

Almost surely, 2^{1311660107591} is an apocalyptic number.

1311660107591 is a deficient number, since it is larger than the sum of its proper divisors (266007793).

1311660107591 is an equidigital number, since it uses as much as digits as its factorization.

1311660107591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266007792.

The product of its (nonzero) digits is 34020, while the sum is 41.

The spelling of 1311660107591 in words is "one trillion, three hundred eleven billion, six hundred sixty million, one hundred seven thousand, five hundred ninety-one".