1328768655743 has 4 divisors (see below), whose sum is σ = 1328784515640. Its totient is φ = 1328752795848.

The previous prime is 1328768655707. The next prime is 1328768655757. The reversal of 1328768655743 is 3475568678231.

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 1328768655743 - 2²² = 1328764461439 is a prime.

It is a super-2 number, since 2×1328768655743² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1328768655743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328768655793) 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, 7803605 + ... + 7972062.

It is an arithmetic number, because the mean of its divisors is an integer number (332196128910).

Almost surely, 2^{1328768655743} is an apocalyptic number.

1328768655743 is a deficient number, since it is larger than the sum of its proper divisors (15859897).

1328768655743 is an equidigital number, since it uses as much as digits as its factorization.

1328768655743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15859896.

The product of its digits is 203212800, while the sum is 65.

The spelling of 1328768655743 in words is "one trillion, three hundred twenty-eight billion, seven hundred sixty-eight million, six hundred fifty-five thousand, seven hundred forty-three".