11217952537553 has 2 divisors, whose sum is σ = 11217952537554. Its totient is φ = 11217952537552.

The previous prime is 11217952537537. The next prime is 11217952537637. The reversal of 11217952537553 is 35573525971211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10184989280449 + 1032963257104 = 3191393^2 + 1016348^2 .

It is a cyclic number.

It is not a de Polignac number, because 11217952537553 - 2⁴ = 11217952537537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11217952737553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608976268776 + 5608976268777.

It is an arithmetic number, because the mean of its divisors is an integer number (5608976268777).

Almost surely, 2^{11217952537553} is an apocalyptic number.

It is an amenable number.

11217952537553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217952537553 is an equidigital number, since it uses as much as digits as its factorization.

11217952537553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9922500, while the sum is 56.

The spelling of 11217952537553 in words is "eleven trillion, two hundred seventeen billion, nine hundred fifty-two million, five hundred thirty-seven thousand, five hundred fifty-three".