163391380025 has 6 divisors (see below), whose sum is σ = 202605311262. Its totient is φ = 130713104000.

The previous prime is 163391380021. The next prime is 163391380063. The reversal of 163391380025 is 520083193361.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2198765881 + 161192614144 = 46891^2 + 401488^2 .

It is not a de Polignac number, because 163391380025 - 2² = 163391380021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163391380021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3267827576 + ... + 3267827625.

It is an arithmetic number, because the mean of its divisors is an integer number (33767551877).

Almost surely, 2^163391380025 is an apocalyptic number.

It is an amenable number.

163391380025 is a deficient number, since it is larger than the sum of its proper divisors (39213931237).

163391380025 is an equidigital number, since it uses as much as digits as its factorization.

163391380025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6535655211 (or 6535655206 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 163391380025 in words is "one hundred sixty-three billion, three hundred ninety-one million, three hundred eighty thousand, twenty-five".