65650056009 has 4 divisors (see below), whose sum is σ = 87533408016. Its totient is φ = 43766704004.

The previous prime is 65650055987. The next prime is 65650056029. The reversal of 65650056009 is 90065005656.

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 65650056009 - 2¹² = 65650051913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65650056029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10941675999 + ... + 10941676004.

It is an arithmetic number, because the mean of its divisors is an integer number (21883352004).

Almost surely, 2^65650056009 is an apocalyptic number.

It is an amenable number.

65650056009 is a deficient number, since it is larger than the sum of its proper divisors (21883352007).

65650056009 is a wasteful number, since it uses less digits than its factorization.

65650056009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21883352006.

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 65650056009 in words is "sixty-five billion, six hundred fifty million, fifty-six thousand, nine".