36536561 has 2 divisors, whose sum is σ = 36536562. Its totient is φ = 36536560.

The previous prime is 36536551. The next prime is 36536579. The reversal of 36536561 is 16563563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35760400 + 776161 = 5980^2 + 881^2 .

It is a cyclic number.

It is not a de Polignac number, because 36536561 - 2¹⁴ = 36520177 is a prime.

It is not a weakly prime, because it can be changed into another prime (36536551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18268280 + 18268281.

It is an arithmetic number, because the mean of its divisors is an integer number (18268281).

Almost surely, 2^36536561 is an apocalyptic number.

It is an amenable number.

36536561 is a deficient number, since it is larger than the sum of its proper divisors (1).

36536561 is an equidigital number, since it uses as much as digits as its factorization.

36536561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 35.

The square root of 36536561 is about 6044.5480393492. The cubic root of 36536561 is about 331.8250911314.

The spelling of 36536561 in words is "thirty-six million, five hundred thirty-six thousand, five hundred sixty-one".