9975085181 has 2 divisors, whose sum is σ = 9975085182. Its totient is φ = 9975085180.

The previous prime is 9975085163. The next prime is 9975085193. The reversal of 9975085181 is 1815805799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9749785081 + 225300100 = 98741^2 + 15010^2 .

It is a cyclic number.

It is not a de Polignac number, because 9975085181 - 2⁶ = 9975085117 is a prime.

It is a super-2 number, since 2×9975085181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9975085151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987542590 + 4987542591.

It is an arithmetic number, because the mean of its divisors is an integer number (4987542591).

Almost surely, 2^9975085181 is an apocalyptic number.

It is an amenable number.

9975085181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975085181 is an equidigital number, since it uses as much as digits as its factorization.

9975085181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 53.

The square root of 9975085181 is about 99875.3482146621. The cubic root of 9975085181 is about 2152.6439570028.

The spelling of 9975085181 in words is "nine billion, nine hundred seventy-five million, eighty-five thousand, one hundred eighty-one".