8512821908 has 6 divisors (see below), whose sum is σ = 14897438346. Its totient is φ = 4256410952.

The previous prime is 8512821901. The next prime is 8512821913. The reversal of 8512821908 is 8091282158.

It can be written as a sum of positive squares in only one way, i.e., 8482041604 + 30780304 = 92098^2 + 5548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8512821901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064102735 + ... + 1064102742.

It is an arithmetic number, because the mean of its divisors is an integer number (2482906391).

Almost surely, 2^8512821908 is an apocalyptic number.

It is an amenable number.

8512821908 is a deficient number, since it is larger than the sum of its proper divisors (6384616438).

8512821908 is a wasteful number, since it uses less digits than its factorization.

8512821908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128205481 (or 2128205479 counting only the distinct ones).

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

The square root of 8512821908 is about 92264.9549287269. The cubic root of 8512821908 is about 2041.8532041617.

The spelling of 8512821908 in words is "eight billion, five hundred twelve million, eight hundred twenty-one thousand, nine hundred eight".