36563573281 has 2 divisors, whose sum is σ = 36563573282. Its totient is φ = 36563573280.

The previous prime is 36563573269. The next prime is 36563573297. The reversal of 36563573281 is 18237536563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21579610000 + 14983963281 = 146900^2 + 122409^2 .

It is an emirp because it is prime and its reverse (18237536563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36563573281 - 2⁹ = 36563572769 is a prime.

It is a super-2 number, since 2×36563573281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36563513281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18281786640 + 18281786641.

It is an arithmetic number, because the mean of its divisors is an integer number (18281786641).

Almost surely, 2^36563573281 is an apocalyptic number.

It is an amenable number.

36563573281 is a deficient number, since it is larger than the sum of its proper divisors (1).

36563573281 is an equidigital number, since it uses as much as digits as its factorization.

36563573281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 49.

The spelling of 36563573281 in words is "thirty-six billion, five hundred sixty-three million, five hundred seventy-three thousand, two hundred eighty-one".