9853505149861 has 2 divisors, whose sum is σ = 9853505149862. Its totient is φ = 9853505149860.

The previous prime is 9853505149843. The next prime is 9853505149867. The reversal of 9853505149861 is 1689415053589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9050957927361 + 802547222500 = 3008481^2 + 895850^2 .

It is a cyclic number.

It is not a de Polignac number, because 9853505149861 - 2¹¹ = 9853505147813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9853505149793 and 9853505149802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9853505149867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4926752574930 + 4926752574931.

It is an arithmetic number, because the mean of its divisors is an integer number (4926752574931).

Almost surely, 2^{9853505149861} is an apocalyptic number.

It is an amenable number.

9853505149861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9853505149861 is an equidigital number, since it uses as much as digits as its factorization.

9853505149861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656000, while the sum is 64.

The spelling of 9853505149861 in words is "nine trillion, eight hundred fifty-three billion, five hundred five million, one hundred forty-nine thousand, eight hundred sixty-one".