11555116543 has 2 divisors, whose sum is σ = 11555116544. Its totient is φ = 11555116542.

The previous prime is 11555116523. The next prime is 11555116567. The reversal of 11555116543 is 34561155511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11555116543 - 2⁹ = 11555116031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11555116523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777558271 + 5777558272.

It is an arithmetic number, because the mean of its divisors is an integer number (5777558272).

Almost surely, 2^11555116543 is an apocalyptic number.

11555116543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555116543 is an equidigital number, since it uses as much as digits as its factorization.

11555116543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 37.

The spelling of 11555116543 in words is "eleven billion, five hundred fifty-five million, one hundred sixteen thousand, five hundred forty-three".