1311446355643 has 4 divisors (see below), whose sum is σ = 1316888042008. Its totient is φ = 1306004669280.

The previous prime is 1311446355617. The next prime is 1311446355671. The reversal of 1311446355643 is 3465536441131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311446355643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311446355593 and 1311446355602.

It is not an unprimeable number, because it can be changed into a prime (1311446325643) 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, 2720842821 + ... + 2720843302.

It is an arithmetic number, because the mean of its divisors is an integer number (329222010502).

Almost surely, 2^{1311446355643} is an apocalyptic number.

1311446355643 is a deficient number, since it is larger than the sum of its proper divisors (5441686365).

1311446355643 is an equidigital number, since it uses as much as digits as its factorization.

1311446355643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5441686364.

The product of its digits is 1555200, while the sum is 46.

The spelling of 1311446355643 in words is "one trillion, three hundred eleven billion, four hundred forty-six million, three hundred fifty-five thousand, six hundred forty-three".