11503135543 has 2 divisors, whose sum is σ = 11503135544. Its totient is φ = 11503135542.

The previous prime is 11503135537. The next prime is 11503135639. The reversal of 11503135543 is 34553130511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11503135543 - 2²⁵ = 11469581111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11503105543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751567771 + 5751567772.

It is an arithmetic number, because the mean of its divisors is an integer number (5751567772).

Almost surely, 2^11503135543 is an apocalyptic number.

11503135543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503135543 is an equidigital number, since it uses as much as digits as its factorization.

11503135543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 11503135543 in words is "eleven billion, five hundred three million, one hundred thirty-five thousand, five hundred forty-three".