168801831025 has 9 divisors (see below), whose sum is σ = 209316817803. Its totient is φ = 135039821400.

The previous prime is 168801831001. The next prime is 168801831073. The reversal of 168801831025 is 520138108861.

The square root of 168801831025 is 410855.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 60768659169 + 108033171856 = 246513^2 + 328684^2 .

It is a de Polignac number, because none of the positive numbers 2^k-168801831025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2013190 + ... + 2095360.

Almost surely, 2^168801831025 is an apocalyptic number.

168801831025 is the 410855-th square number.

168801831025 is the 205428-th centered octagonal number.

It is an amenable number.

168801831025 is a deficient number, since it is larger than the sum of its proper divisors (40514986778).

168801831025 is an frugal number, since it uses more digits than its factorization.

168801831025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164352 (or 82176 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

Adding to 168801831025 its reverse (520138108861), we get a palindrome (688939939886).

The spelling of 168801831025 in words is "one hundred sixty-eight billion, eight hundred one million, eight hundred thirty-one thousand, twenty-five".