9915546161 has 2 divisors, whose sum is σ = 9915546162. Its totient is φ = 9915546160.

The previous prime is 9915546139. The next prime is 9915546203. The reversal of 9915546161 is 1616455199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9912193600 + 3352561 = 99560^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 9915546161 - 2⁶ = 9915546097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9915546461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4957773080 + 4957773081.

It is an arithmetic number, because the mean of its divisors is an integer number (4957773081).

Almost surely, 2^9915546161 is an apocalyptic number.

It is an amenable number.

9915546161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9915546161 is an equidigital number, since it uses as much as digits as its factorization.

9915546161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 47.

The square root of 9915546161 is about 99576.8354638768. The cubic root of 9915546161 is about 2148.3525263442.

The spelling of 9915546161 in words is "nine billion, nine hundred fifteen million, five hundred forty-six thousand, one hundred sixty-one".