1311616513663 has 4 divisors (see below), whose sum is σ = 1311926666040. Its totient is φ = 1311306361288.

The previous prime is 1311616513661. The next prime is 1311616513709. The reversal of 1311616513663 is 3663156161131.

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 1311616513663 - 2¹ = 1311616513661 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 (1311616513661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155069845 + ... + 155078302.

It is an arithmetic number, because the mean of its divisors is an integer number (327981666510).

Almost surely, 2^{1311616513663} is an apocalyptic number.

1311616513663 is a deficient number, since it is larger than the sum of its proper divisors (310152377).

1311616513663 is an equidigital number, since it uses as much as digits as its factorization.

1311616513663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310152376.

The product of its digits is 174960, while the sum is 43.

The spelling of 1311616513663 in words is "one trillion, three hundred eleven billion, six hundred sixteen million, five hundred thirteen thousand, six hundred sixty-three".