11565016543 has 2 divisors, whose sum is σ = 11565016544. Its totient is φ = 11565016542.

The previous prime is 11565016483. The next prime is 11565016559. The reversal of 11565016543 is 34561056511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11565016543 - 2²¹ = 11562919391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11565016583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782508271 + 5782508272.

It is an arithmetic number, because the mean of its divisors is an integer number (5782508272).

Almost surely, 2^11565016543 is an apocalyptic number.

11565016543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565016543 is an equidigital number, since it uses as much as digits as its factorization.

11565016543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 11565016543 in words is "eleven billion, five hundred sixty-five million, sixteen thousand, five hundred forty-three".