11245644343561 has 2 divisors, whose sum is σ = 11245644343562. Its totient is φ = 11245644343560.

The previous prime is 11245644343543. The next prime is 11245644343601. The reversal of 11245644343561 is 16534344654211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9515219855625 + 1730424487936 = 3084675^2 + 1315456^2 .

It is an emirp because it is prime and its reverse (16534344654211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11245644343561 - 2²¹ = 11245642246409 is a prime.

It is not a weakly prime, because it can be changed into another prime (11245644343511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5622822171780 + 5622822171781.

It is an arithmetic number, because the mean of its divisors is an integer number (5622822171781).

Almost surely, 2^{11245644343561} is an apocalyptic number.

It is an amenable number.

11245644343561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11245644343561 is an equidigital number, since it uses as much as digits as its factorization.

11245644343561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 49.

Adding to 11245644343561 its reverse (16534344654211), we get a palindrome (27779988997772).

The spelling of 11245644343561 in words is "eleven trillion, two hundred forty-five billion, six hundred forty-four million, three hundred forty-three thousand, five hundred sixty-one".