65555050009 has 2 divisors, whose sum is σ = 65555050010. Its totient is φ = 65555050008.

The previous prime is 65555050007. The next prime is 65555050031. The reversal of 65555050009 is 90005055556.

65555050009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56704944384 + 8850105625 = 238128^2 + 94075^2 .

It is a cyclic number.

It is not a de Polignac number, because 65555050009 - 2¹ = 65555050007 is a prime.

Together with 65555050007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65555050007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32777525004 + 32777525005.

It is an arithmetic number, because the mean of its divisors is an integer number (32777525005).

Almost surely, 2^65555050009 is an apocalyptic number.

It is an amenable number.

65555050009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65555050009 is an equidigital number, since it uses as much as digits as its factorization.

65555050009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168750, while the sum is 40.

The spelling of 65555050009 in words is "sixty-five billion, five hundred fifty-five million, fifty thousand, nine".