2556338065063 has 2 divisors, whose sum is σ = 2556338065064. Its totient is φ = 2556338065062.

The previous prime is 2556338065019. The next prime is 2556338065067. The reversal of 2556338065063 is 3605608336552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556338065063 - 2²⁹ = 2555801194151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2556338065063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556338065067) by changing a digit.

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 as a sum of consecutive naturals, namely, 1278169032531 + 1278169032532.

It is an arithmetic number, because the mean of its divisors is an integer number (1278169032532).

Almost surely, 2^{2556338065063} is an apocalyptic number.

2556338065063 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556338065063 is an equidigital number, since it uses as much as digits as its factorization.

2556338065063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 52.

The spelling of 2556338065063 in words is "two trillion, five hundred fifty-six billion, three hundred thirty-eight million, sixty-five thousand, sixty-three".