11555204866567 has 2 divisors, whose sum is σ = 11555204866568. Its totient is φ = 11555204866566.

The previous prime is 11555204866493. The next prime is 11555204866589. The reversal of 11555204866567 is 76566840255511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11555204866567 - 2³⁹ = 11005449052679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11555204866267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777602433283 + 5777602433284.

It is an arithmetic number, because the mean of its divisors is an integer number (5777602433284).

Almost surely, 2^{11555204866567} is an apocalyptic number.

11555204866567 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555204866567 is an equidigital number, since it uses as much as digits as its factorization.

11555204866567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480000, while the sum is 61.

The spelling of 11555204866567 in words is "eleven trillion, five hundred fifty-five billion, two hundred four million, eight hundred sixty-six thousand, five hundred sixty-seven".