7985555089 has 2 divisors, whose sum is σ = 7985555090. Its totient is φ = 7985555088.

The previous prime is 7985555029. The next prime is 7985555093. The reversal of 7985555089 is 9805555897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5273228689 + 2712326400 = 72617^2 + 52080^2 .

It is an emirp because it is prime and its reverse (9805555897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7985555089 - 2⁷ = 7985554961 is a prime.

It is not a weakly prime, because it can be changed into another prime (7985555029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992777544 + 3992777545.

It is an arithmetic number, because the mean of its divisors is an integer number (3992777545).

Almost surely, 2^7985555089 is an apocalyptic number.

It is an amenable number.

7985555089 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985555089 is an equidigital number, since it uses as much as digits as its factorization.

7985555089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680000, while the sum is 61.

The square root of 7985555089 is about 89361.9331091265. The cubic root of 7985555089 is about 1998.7955321909.

The spelling of 7985555089 in words is "seven billion, nine hundred eighty-five million, five hundred fifty-five thousand, eighty-nine".