9812810825 has 12 divisors (see below), whose sum is σ = 12182588940. Its totient is φ = 7840762560.

The previous prime is 9812810807. The next prime is 9812810837. The reversal of 9812810825 is 5280182189.

It can be written as a sum of positive squares in 6 ways, for example, as 2102039104 + 7710771721 = 45848^2 + 87811^2 .

It is not a de Polignac number, because 9812810825 - 2⁸ = 9812810569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216014 + ... + 257463.

It is an arithmetic number, because the mean of its divisors is an integer number (1015215745).

Almost surely, 2^9812810825 is an apocalyptic number.

It is an amenable number.

9812810825 is a deficient number, since it is larger than the sum of its proper divisors (2369778115).

9812810825 is a wasteful number, since it uses less digits than its factorization.

9812810825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474316 (or 474311 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 44.

The square root of 9812810825 is about 99059.6326714369. The cubic root of 9812810825 is about 2140.9070328169.

The spelling of 9812810825 in words is "nine billion, eight hundred twelve million, eight hundred ten thousand, eight hundred twenty-five".