36688658509 has 2 divisors, whose sum is σ = 36688658510. Its totient is φ = 36688658508.

The previous prime is 36688658507. The next prime is 36688658527. The reversal of 36688658509 is 90585688663.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24876229284 + 11812429225 = 157722^2 + 108685^2 .

It is a cyclic number.

It is not a de Polignac number, because 36688658509 - 2¹ = 36688658507 is a prime.

Together with 36688658507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36688658507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18344329254 + 18344329255.

It is an arithmetic number, because the mean of its divisors is an integer number (18344329255).

Almost surely, 2^36688658509 is an apocalyptic number.

It is an amenable number.

36688658509 is a deficient number, since it is larger than the sum of its proper divisors (1).

36688658509 is an equidigital number, since it uses as much as digits as its factorization.

36688658509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74649600, while the sum is 64.

The spelling of 36688658509 in words is "thirty-six billion, six hundred eighty-eight million, six hundred fifty-eight thousand, five hundred nine".