163505530187 has 2 divisors, whose sum is σ = 163505530188. Its totient is φ = 163505530186.

The previous prime is 163505530163. The next prime is 163505530189. The reversal of 163505530187 is 781035505361.

It is a strong prime.

It is an emirp because it is prime and its reverse (781035505361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163505530187 - 2⁸ = 163505529931 is a prime.

Together with 163505530189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163505530189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81752765093 + 81752765094.

It is an arithmetic number, because the mean of its divisors is an integer number (81752765094).

Almost surely, 2^163505530187 is an apocalyptic number.

163505530187 is a deficient number, since it is larger than the sum of its proper divisors (1).

163505530187 is an equidigital number, since it uses as much as digits as its factorization.

163505530187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 163505530187 in words is "one hundred sixty-three billion, five hundred five million, five hundred thirty thousand, one hundred eighty-seven".