8500000005 has 64 divisors (see below), whose sum is σ = 17310558720. Its totient is φ = 3876553728.

The previous prime is 8499999941. The next prime is 8500000013. The reversal of 8500000005 is 5000000058.

It is not a de Polignac number, because 8500000005 - 2⁶ = 8499999941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398799 + ... + 419571.

It is an arithmetic number, because the mean of its divisors is an integer number (270477480).

Almost surely, 2^8500000005 is an apocalyptic number.

It is an amenable number.

8500000005 is an abundant number, since it is smaller than the sum of its proper divisors (8810558715).

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

8500000005 is a wasteful number, since it uses less digits than its factorization.

8500000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21227 (or 21221 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 8500000005 is about 92195.4446000452. Note that the first 3 decimals coincide. The cubic root of 8500000005 is about 2040.8275513588.

The spelling of 8500000005 in words is "eight billion, five hundred million, five", and thus it is an aban number.