11555116523 has 2 divisors, whose sum is σ = 11555116524. Its totient is φ = 11555116522.

The previous prime is 11555116471. The next prime is 11555116543. The reversal of 11555116523 is 32561155511.

It is a strong prime.

It is an emirp because it is prime and its reverse (32561155511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11555116523 - 2¹⁰ = 11555115499 is a prime.

It is not a weakly prime, because it can be changed into another prime (11555116543) 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, 5777558261 + 5777558262.

It is an arithmetic number, because the mean of its divisors is an integer number (5777558262).

Almost surely, 2^11555116523 is an apocalyptic number.

11555116523 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555116523 is an equidigital number, since it uses as much as digits as its factorization.

11555116523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22500, while the sum is 35.

The spelling of 11555116523 in words is "eleven billion, five hundred fifty-five million, one hundred sixteen thousand, five hundred twenty-three".