36561053553509 has 2 divisors, whose sum is σ = 36561053553510. Its totient is φ = 36561053553508.

The previous prime is 36561053553503. The next prime is 36561053553511. The reversal of 36561053553509 is 90535535016563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23144729944609 + 13416323608900 = 4810897^2 + 3662830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36561053553509 is a prime.

Together with 36561053553511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36561053553503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18280526776754 + 18280526776755.

It is an arithmetic number, because the mean of its divisors is an integer number (18280526776755).

Almost surely, 2^{36561053553509} is an apocalyptic number.

It is an amenable number.

36561053553509 is a deficient number, since it is larger than the sum of its proper divisors (1).

36561053553509 is an equidigital number, since it uses as much as digits as its factorization.

36561053553509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27337500, while the sum is 56.

The spelling of 36561053553509 in words is "thirty-six trillion, five hundred sixty-one billion, fifty-three million, five hundred fifty-three thousand, five hundred nine".