65201218009 has 4 divisors (see below), whose sum is σ = 65210227216. Its totient is φ = 65192208804.

The previous prime is 65201217929. The next prime is 65201218013. The reversal of 65201218009 is 90081210256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65201218009 - 2⁷ = 65201217881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65201218079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4493739 + ... + 4508224.

It is an arithmetic number, because the mean of its divisors is an integer number (16302556804).

Almost surely, 2^65201218009 is an apocalyptic number.

It is an amenable number.

65201218009 is a deficient number, since it is larger than the sum of its proper divisors (9009207).

65201218009 is an equidigital number, since it uses as much as digits as its factorization.

65201218009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9009206.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 65201218009 in words is "sixty-five billion, two hundred one million, two hundred eighteen thousand, nine".