11783645009 has 2 divisors, whose sum is σ = 11783645010. Its totient is φ = 11783645008.

The previous prime is 11783644969. The next prime is 11783645021. The reversal of 11783645009 is 90054638711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11747308225 + 36336784 = 108385^2 + 6028^2 .

It is a cyclic number.

It is not a de Polignac number, because 11783645009 - 2²⁰ = 11782596433 is a prime.

It is a super-3 number, since 3×11783645009³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (11783645509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5891822504 + 5891822505.

It is an arithmetic number, because the mean of its divisors is an integer number (5891822505).

Almost surely, 2^11783645009 is an apocalyptic number.

It is an amenable number.

11783645009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11783645009 is an equidigital number, since it uses as much as digits as its factorization.

11783645009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 11783645009 in words is "eleven billion, seven hundred eighty-three million, six hundred forty-five thousand, nine".