9661836517 has 2 divisors, whose sum is σ = 9661836518. Its totient is φ = 9661836516.

The previous prime is 9661836493. The next prime is 9661836551. The reversal of 9661836517 is 7156381669.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8731220481 + 930616036 = 93441^2 + 30506^2 .

It is an emirp because it is prime and its reverse (7156381669) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9661836517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661536517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830918258 + 4830918259.

It is an arithmetic number, because the mean of its divisors is an integer number (4830918259).

Almost surely, 2^9661836517 is an apocalyptic number.

It is an amenable number.

9661836517 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661836517 is an equidigital number, since it uses as much as digits as its factorization.

9661836517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 9661836517 is about 98294.6413442767. The cubic root of 9661836517 is about 2129.8706466297.

The spelling of 9661836517 in words is "nine billion, six hundred sixty-one million, eight hundred thirty-six thousand, five hundred seventeen".