163566271625 has 16 divisors (see below), whose sum is σ = 204145772688. Its totient is φ = 130843360000.

The previous prime is 163566271573. The next prime is 163566271639. The reversal of 163566271625 is 526172665361.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 41790398329 + 121775873296 = 204427^2 + 348964^2 .

It is not a de Polignac number, because 163566271625 - 2²⁰ = 163565223049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1997489 + ... + 2077761.

It is an arithmetic number, because the mean of its divisors is an integer number (12759110793).

Almost surely, 2^163566271625 is an apocalyptic number.

It is an amenable number.

163566271625 is a deficient number, since it is larger than the sum of its proper divisors (40579501063).

163566271625 is an equidigital number, since it uses as much as digits as its factorization.

163566271625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96589 (or 96579 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 50.

The spelling of 163566271625 in words is "one hundred sixty-three billion, five hundred sixty-six million, two hundred seventy-one thousand, six hundred twenty-five".