2556320323343 has 16 divisors (see below), whose sum is σ = 2694600794880. Its totient is φ = 2421390107136.

The previous prime is 2556320323289. The next prime is 2556320323351. The reversal of 2556320323343 is 3433230236552.

It is a cyclic number.

It is not a de Polignac number, because 2556320323343 - 2¹⁰ = 2556320322319 is a prime.

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 2556320323343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556320323643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19141346 + ... + 19274432.

It is an arithmetic number, because the mean of its divisors is an integer number (168412549680).

Almost surely, 2^{2556320323343} is an apocalyptic number.

2556320323343 is a deficient number, since it is larger than the sum of its proper divisors (138280471537).

2556320323343 is a wasteful number, since it uses less digits than its factorization.

2556320323343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145666.

The product of its (nonzero) digits is 1166400, while the sum is 41.

Adding to 2556320323343 its reverse (3433230236552), we get a palindrome (5989550559895).

The spelling of 2556320323343 in words is "two trillion, five hundred fifty-six billion, three hundred twenty million, three hundred twenty-three thousand, three hundred forty-three".