11515650617 has 2 divisors, whose sum is σ = 11515650618. Its totient is φ = 11515650616.

The previous prime is 11515650613. The next prime is 11515650683. The reversal of 11515650617 is 71605651511.

11515650617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10553658361 + 961992256 = 102731^2 + 31016^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515650617 - 2² = 11515650613 is a prime.

It is a super-2 number, since 2×11515650617² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11515650613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757825308 + 5757825309.

It is an arithmetic number, because the mean of its divisors is an integer number (5757825309).

Almost surely, 2^11515650617 is an apocalyptic number.

It is an amenable number.

11515650617 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515650617 is an equidigital number, since it uses as much as digits as its factorization.

11515650617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 38.

The spelling of 11515650617 in words is "eleven billion, five hundred fifteen million, six hundred fifty thousand, six hundred seventeen".