36687609617 has 2 divisors, whose sum is σ = 36687609618. Its totient is φ = 36687609616.

The previous prime is 36687609547. The next prime is 36687609643. The reversal of 36687609617 is 71690678663.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27402167296 + 9285442321 = 165536^2 + 96361^2 .

It is an emirp because it is prime and its reverse (71690678663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36687609617 - 2²² = 36683415313 is a prime.

It is not a weakly prime, because it can be changed into another prime (36687609697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18343804808 + 18343804809.

It is an arithmetic number, because the mean of its divisors is an integer number (18343804809).

Almost surely, 2^36687609617 is an apocalyptic number.

It is an amenable number.

36687609617 is a deficient number, since it is larger than the sum of its proper divisors (1).

36687609617 is an equidigital number, since it uses as much as digits as its factorization.

36687609617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 59.

The spelling of 36687609617 in words is "thirty-six billion, six hundred eighty-seven million, six hundred nine thousand, six hundred seventeen".