9902501825 has 6 divisors (see below), whose sum is σ = 12279102294. Its totient is φ = 7922001440.

The previous prime is 9902501809. The next prime is 9902501837. The reversal of 9902501825 is 5281052099.

9902501825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 296149681 + 9606352144 = 17209^2 + 98012^2 .

It is not a de Polignac number, because 9902501825 - 2⁴ = 9902501809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198050012 + ... + 198050061.

It is an arithmetic number, because the mean of its divisors is an integer number (2046517049).

Almost surely, 2^9902501825 is an apocalyptic number.

It is an amenable number.

9902501825 is a deficient number, since it is larger than the sum of its proper divisors (2376600469).

9902501825 is a wasteful number, since it uses less digits than its factorization.

9902501825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396100083 (or 396100078 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 9902501825 is about 99511.3150601478. The cubic root of 9902501825 is about 2147.4100289234.

The spelling of 9902501825 in words is "nine billion, nine hundred two million, five hundred one thousand, eight hundred twenty-five".