11555204866589 has 2 divisors, whose sum is σ = 11555204866590. Its totient is φ = 11555204866588.

The previous prime is 11555204866567. The next prime is 11555204866613. The reversal of 11555204866589 is 98566840255511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8918614824025 + 2636590042564 = 2986405^2 + 1623758^2 .

It is a cyclic number.

It is not a de Polignac number, because 11555204866589 - 2³⁶ = 11486485389853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11555204866789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777602433294 + 5777602433295.

It is an arithmetic number, because the mean of its divisors is an integer number (5777602433295).

Almost surely, 2^{11555204866589} is an apocalyptic number.

It is an amenable number.

11555204866589 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555204866589 is an equidigital number, since it uses as much as digits as its factorization.

11555204866589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680000, while the sum is 65.

The spelling of 11555204866589 in words is "eleven trillion, five hundred fifty-five billion, two hundred four million, eight hundred sixty-six thousand, five hundred eighty-nine".