168161607025 has 6 divisors (see below), whose sum is σ = 208520392742. Its totient is φ = 134529285600.

The previous prime is 168161607007. The next prime is 168161607041. The reversal of 168161607025 is 520706161861.

It can be written as a sum of positive squares in 3 ways, for example, as 726787681 + 167434819344 = 26959^2 + 409188^2 .

It is not a de Polignac number, because 168161607025 - 2⁹ = 168161606513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3363232116 + ... + 3363232165.

Almost surely, 2^168161607025 is an apocalyptic number.

It is an amenable number.

168161607025 is a deficient number, since it is larger than the sum of its proper divisors (40358785717).

168161607025 is an equidigital number, since it uses as much as digits as its factorization.

168161607025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726464291 (or 6726464286 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

Adding to 168161607025 its reverse (520706161861), we get a palindrome (688867768886).

The spelling of 168161607025 in words is "one hundred sixty-eight billion, one hundred sixty-one million, six hundred seven thousand, twenty-five".