1311423356345 has 8 divisors (see below), whose sum is σ = 1573890200520. Its totient is φ = 1049017236480.

The previous prime is 1311423356333. The next prime is 1311423356357. The reversal of 1311423356345 is 5436533241131.

It is an interprime number because it is at equal distance from previous prime (1311423356333) and next prime (1311423356357).

It can be written as a sum of positive squares in 4 ways, for example, as 20588806144 + 1290834550201 = 143488^2 + 1136149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311423356345 - 2¹⁶ = 1311423290809 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15133550 + ... + 15219959.

It is an arithmetic number, because the mean of its divisors is an integer number (196736275065).

Almost surely, 2^{1311423356345} is an apocalyptic number.

It is an amenable number.

1311423356345 is a deficient number, since it is larger than the sum of its proper divisors (262466844175).

1311423356345 is an equidigital number, since it uses as much as digits as its factorization.

1311423356345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30362155.

The product of its digits is 388800, while the sum is 41.

Adding to 1311423356345 its reverse (5436533241131), we get a palindrome (6747956597476).

The spelling of 1311423356345 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, three hundred fifty-six thousand, three hundred forty-five".