163013555005181 has 2 divisors, whose sum is σ = 163013555005182. Its totient is φ = 163013555005180.

The previous prime is 163013555005153. The next prime is 163013555005219. The reversal of 163013555005181 is 181500555310361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138987382282681 + 24026172722500 = 11789291^2 + 4901650^2 .

It is a cyclic number.

It is not a de Polignac number, because 163013555005181 - 2²⁶ = 163013487896317 is a prime.

It is a super-2 number, since 2×163013555005181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163013555005111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81506777502590 + 81506777502591.

It is an arithmetic number, because the mean of its divisors is an integer number (81506777502591).

Almost surely, 2^{163013555005181} is an apocalyptic number.

It is an amenable number.

163013555005181 is a deficient number, since it is larger than the sum of its proper divisors (1).

163013555005181 is an equidigital number, since it uses as much as digits as its factorization.

163013555005181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270000, while the sum is 44.

The spelling of 163013555005181 in words is "one hundred sixty-three trillion, thirteen billion, five hundred fifty-five million, five thousand, one hundred eighty-one".