11775538543 has 2 divisors, whose sum is σ = 11775538544. Its totient is φ = 11775538542.

The previous prime is 11775538507. The next prime is 11775538547. The reversal of 11775538543 is 34583557711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11775538543 - 2¹⁷ = 11775407471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11775538547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5887769271 + 5887769272.

It is an arithmetic number, because the mean of its divisors is an integer number (5887769272).

Almost surely, 2^11775538543 is an apocalyptic number.

11775538543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11775538543 is an equidigital number, since it uses as much as digits as its factorization.

11775538543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764000, while the sum is 49.

The spelling of 11775538543 in words is "eleven billion, seven hundred seventy-five million, five hundred thirty-eight thousand, five hundred forty-three".