168647502025 has 6 divisors (see below), whose sum is σ = 209122902542. Its totient is φ = 134918001600.

The previous prime is 168647502011. The next prime is 168647502041. The reversal of 168647502025 is 520205746861.

It can be written as a sum of positive squares in 3 ways, for example, as 8276086729 + 160371415296 = 90973^2 + 400464^2 .

It is not a de Polignac number, because 168647502025 - 2⁵ = 168647501993 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, 3372950016 + ... + 3372950065.

Almost surely, 2^168647502025 is an apocalyptic number.

It is an amenable number.

168647502025 is a deficient number, since it is larger than the sum of its proper divisors (40475400517).

168647502025 is an equidigital number, since it uses as much as digits as its factorization.

168647502025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745900091 (or 6745900086 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 168647502025 in words is "one hundred sixty-eight billion, six hundred forty-seven million, five hundred two thousand, twenty-five".