2556023162689 has 2 divisors, whose sum is σ = 2556023162690. Its totient is φ = 2556023162688.

The previous prime is 2556023162647. The next prime is 2556023162773. The reversal of 2556023162689 is 9862613206552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2096892244225 + 459130918464 = 1448065^2 + 677592^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556023162689 - 2²⁹ = 2555486291777 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556023162629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278011581344 + 1278011581345.

It is an arithmetic number, because the mean of its divisors is an integer number (1278011581345).

Almost surely, 2^{2556023162689} is an apocalyptic number.

It is an amenable number.

2556023162689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556023162689 is an equidigital number, since it uses as much as digits as its factorization.

2556023162689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 2556023162689 in words is "two trillion, five hundred fifty-six billion, twenty-three million, one hundred sixty-two thousand, six hundred eighty-nine".