8625490009 has 2 divisors, whose sum is σ = 8625490010. Its totient is φ = 8625490008.

The previous prime is 8625490007. The next prime is 8625490043. The reversal of 8625490009 is 9000945268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6343326025 + 2282163984 = 79645^2 + 47772^2 .

It is a cyclic number.

It is not a de Polignac number, because 8625490009 - 2¹ = 8625490007 is a prime.

Together with 8625490007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8625490001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4312745004 + 4312745005.

It is an arithmetic number, because the mean of its divisors is an integer number (4312745005).

Almost surely, 2^8625490009 is an apocalyptic number.

It is an amenable number.

8625490009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8625490009 is an equidigital number, since it uses as much as digits as its factorization.

8625490009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 8625490009 is about 92873.5161873394. The cubic root of 8625490009 is about 2050.8218009122.

The spelling of 8625490009 in words is "eight billion, six hundred twenty-five million, four hundred ninety thousand, nine".