9899255025 has 189 divisors, whose sum is σ = 20535842523. Its totient is φ = 4728002400.

The previous prime is 9899255011. The next prime is 9899255029. The reversal of 9899255025 is 5205529989.

The square root of 9899255025 is 99495.

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

9899255025 is a `hidden beast` number, since 9 + 89 + 9 + 2 + 550 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3563731809 + 6335523216 = 59697^2 + 79596^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9899255025 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9899255029) by changing a digit.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 147750042 + ... + 147750108.

Almost surely, 2^9899255025 is an apocalyptic number.

9899255025 is the 99495-th square number.

9899255025 is the 49748-th centered octagonal number.

It is an amenable number.

9899255025 is an abundant number, since it is smaller than the sum of its proper divisors (10636587498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9899255025 is an equidigital number, since it uses as much as digits as its factorization.

9899255025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 54.

The cubic root of 9899255025 is about 2147.1753080029.

The spelling of 9899255025 in words is "nine billion, eight hundred ninety-nine million, two hundred fifty-five thousand, twenty-five".