36563561 has 2 divisors, whose sum is σ = 36563562. Its totient is φ = 36563560.

The previous prime is 36563531. The next prime is 36563563. The reversal of 36563561 is 16536563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27825625 + 8737936 = 5275^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 36563561 - 2⁶ = 36563497 is a prime.

Together with 36563563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36563563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18281780 + 18281781.

It is an arithmetic number, because the mean of its divisors is an integer number (18281781).

Almost surely, 2^36563561 is an apocalyptic number.

It is an amenable number.

36563561 is a deficient number, since it is larger than the sum of its proper divisors (1).

36563561 is an equidigital number, since it uses as much as digits as its factorization.

36563561 is an evil number, because the sum of its binary digits is even.

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

The square root of 36563561 is about 6046.7810444897. The cubic root of 36563561 is about 331.9068090161.

The spelling of 36563561 in words is "thirty-six million, five hundred sixty-three thousand, five hundred sixty-one".