9849869617813 has 2 divisors, whose sum is σ = 9849869617814. Its totient is φ = 9849869617812.

The previous prime is 9849869617811. The next prime is 9849869617823. The reversal of 9849869617813 is 3187169689489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5106433906564 + 4743435711249 = 2259742^2 + 2177943^2 .

It is a cyclic number.

It is not a de Polignac number, because 9849869617813 - 2¹ = 9849869617811 is a prime.

It is a super-2 number, since 2×9849869617813² (a number of 27 digits) contains 22 as substring.

Together with 9849869617811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9849869617811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4924934808906 + 4924934808907.

It is an arithmetic number, because the mean of its divisors is an integer number (4924934808907).

Almost surely, 2^{9849869617813} is an apocalyptic number.

It is an amenable number.

9849869617813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9849869617813 is an equidigital number, since it uses as much as digits as its factorization.

9849869617813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128701952, while the sum is 79.

The spelling of 9849869617813 in words is "nine trillion, eight hundred forty-nine billion, eight hundred sixty-nine million, six hundred seventeen thousand, eight hundred thirteen".