8625664189 has 2 divisors, whose sum is σ = 8625664190. Its totient is φ = 8625664188.

The previous prime is 8625664147. The next prime is 8625664199. The reversal of 8625664189 is 9814665268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6884020900 + 1741643289 = 82970^2 + 41733^2 .

It is a cyclic number.

It is not a de Polignac number, because 8625664189 - 2²⁹ = 8088793277 is a prime.

It is a super-3 number, since 3×8625664189³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8625664129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4312832094 + 4312832095.

It is an arithmetic number, because the mean of its divisors is an integer number (4312832095).

Almost surely, 2^8625664189 is an apocalyptic number.

It is an amenable number.

8625664189 is a deficient number, since it is larger than the sum of its proper divisors (1).

8625664189 is an equidigital number, since it uses as much as digits as its factorization.

8625664189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 55.

The square root of 8625664189 is about 92874.4539095655. The cubic root of 8625664189 is about 2050.8356053352.

The spelling of 8625664189 in words is "eight billion, six hundred twenty-five million, six hundred sixty-four thousand, one hundred eighty-nine".