1311798873845 has 8 divisors (see below), whose sum is σ = 1574327298264. Its totient is φ = 1049326665984.

The previous prime is 1311798873817. The next prime is 1311798873887. The reversal of 1311798873845 is 5483788971131.

It can be written as a sum of positive squares in 4 ways, for example, as 230960019889 + 1080838853956 = 480583^2 + 1039634^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1311798873845 - 2⁸ = 1311798873589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 14002784 + ... + 14096153.

It is an arithmetic number, because the mean of its divisors is an integer number (196790912283).

Almost surely, 2^{1311798873845} is an apocalyptic number.

It is an amenable number.

1311798873845 is a deficient number, since it is larger than the sum of its proper divisors (262528424419).

1311798873845 is an equidigital number, since it uses as much as digits as its factorization.

1311798873845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28108279.

The product of its digits is 40642560, while the sum is 65.

The spelling of 1311798873845 in words is "one trillion, three hundred eleven billion, seven hundred ninety-eight million, eight hundred seventy-three thousand, eight hundred forty-five".