1311613434666 has 64 divisors (see below), whose sum is σ = 2957247619200. Its totient is φ = 430848367488.

The previous prime is 1311613434661. The next prime is 1311613434671. The reversal of 1311613434666 is 6664343161131.

It is an interprime number because it is at equal distance from previous prime (1311613434661) and next prime (1311613434671).

It is not an unprimeable number, because it can be changed into a prime (1311613434661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1410790 + ... + 2147918.

It is an arithmetic number, because the mean of its divisors is an integer number (46206994050).

Almost surely, 2^{1311613434666} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311613434666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478623809600).

1311613434666 is an abundant number, since it is smaller than the sum of its proper divisors (1645634184534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311613434666 is a wasteful number, since it uses less digits than its factorization.

1311613434666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737620 (or 737614 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

Adding to 1311613434666 its reverse (6664343161131), we get a palindrome (7975956595797).

The spelling of 1311613434666 in words is "one trillion, three hundred eleven billion, six hundred thirteen million, four hundred thirty-four thousand, six hundred sixty-six".