11564443551013 has 2 divisors, whose sum is σ = 11564443551014. Its totient is φ = 11564443551012.

The previous prime is 11564443550993. The next prime is 11564443551083. The reversal of 11564443551013 is 31015534446511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9142507700964 + 2421935850049 = 3023658^2 + 1556257^2 .

It is a cyclic number.

It is not a de Polignac number, because 11564443551013 - 2⁵ = 11564443550981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11564443551083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5782221775506 + 5782221775507.

It is an arithmetic number, because the mean of its divisors is an integer number (5782221775507).

Almost surely, 2^{11564443551013} is an apocalyptic number.

It is an amenable number.

11564443551013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11564443551013 is an equidigital number, since it uses as much as digits as its factorization.

11564443551013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 43.

Adding to 11564443551013 its reverse (31015534446511), we get a palindrome (42579977997524).

The spelling of 11564443551013 in words is "eleven trillion, five hundred sixty-four billion, four hundred forty-three million, five hundred fifty-one thousand, thirteen".