11786855009 has 2 divisors, whose sum is σ = 11786855010. Its totient is φ = 11786855008.

The previous prime is 11786854969. The next prime is 11786855077. The reversal of 11786855009 is 90055868711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11411580625 + 375274384 = 106825^2 + 19372^2 .

It is a cyclic number.

It is not a de Polignac number, because 11786855009 - 2¹² = 11786850913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11786855099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5893427504 + 5893427505.

It is an arithmetic number, because the mean of its divisors is an integer number (5893427505).

Almost surely, 2^11786855009 is an apocalyptic number.

It is an amenable number.

11786855009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11786855009 is an equidigital number, since it uses as much as digits as its factorization.

11786855009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 11786855009 in words is "eleven billion, seven hundred eighty-six million, eight hundred fifty-five thousand, nine".