85518464089 has 2 divisors, whose sum is σ = 85518464090. Its totient is φ = 85518464088.

The previous prime is 85518464041. The next prime is 85518464107. The reversal of 85518464089 is 98046481558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60890497600 + 24627966489 = 246760^2 + 156933^2 .

It is a cyclic number.

It is not a de Polignac number, because 85518464089 - 2²¹ = 85516366937 is a prime.

It is not a weakly prime, because it can be changed into another prime (85518464489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42759232044 + 42759232045.

It is an arithmetic number, because the mean of its divisors is an integer number (42759232045).

Almost surely, 2^85518464089 is an apocalyptic number.

It is an amenable number.

85518464089 is a deficient number, since it is larger than the sum of its proper divisors (1).

85518464089 is an equidigital number, since it uses as much as digits as its factorization.

85518464089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 85518464089 in words is "eighty-five billion, five hundred eighteen million, four hundred sixty-four thousand, eighty-nine".