11564408543 has 2 divisors, whose sum is σ = 11564408544. Its totient is φ = 11564408542.

The previous prime is 11564408489. The next prime is 11564408551. The reversal of 11564408543 is 34580446511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11564408543 is a prime.

It is a super-2 number, since 2×11564408543² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11564408543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11564408573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782204271 + 5782204272.

It is an arithmetic number, because the mean of its divisors is an integer number (5782204272).

Almost surely, 2^11564408543 is an apocalyptic number.

11564408543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11564408543 is an equidigital number, since it uses as much as digits as its factorization.

11564408543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 11564408543 in words is "eleven billion, five hundred sixty-four million, four hundred eight thousand, five hundred forty-three".