12636140617 has 2 divisors, whose sum is σ = 12636140618. Its totient is φ = 12636140616.

The previous prime is 12636140599. The next prime is 12636140669. The reversal of 12636140617 is 71604163621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6516364176 + 6119776441 = 80724^2 + 78229^2 .

It is a cyclic number.

It is not a de Polignac number, because 12636140617 - 2¹¹ = 12636138569 is a prime.

It is not a weakly prime, because it can be changed into another prime (12636140917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318070308 + 6318070309.

It is an arithmetic number, because the mean of its divisors is an integer number (6318070309).

Almost surely, 2^12636140617 is an apocalyptic number.

It is an amenable number.

12636140617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12636140617 is an equidigital number, since it uses as much as digits as its factorization.

12636140617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 12636140617 in words is "twelve billion, six hundred thirty-six million, one hundred forty thousand, six hundred seventeen".