64530205111 has 4 divisors (see below), whose sum is σ = 64544965992. Its totient is φ = 64515444232.

The previous prime is 64530205109. The next prime is 64530205147. The reversal of 64530205111 is 11150203546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64530205111 - 2¹ = 64530205109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64530205111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64530205511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7373881 + ... + 7382626.

It is an arithmetic number, because the mean of its divisors is an integer number (16136241498).

Almost surely, 2^64530205111 is an apocalyptic number.

64530205111 is a deficient number, since it is larger than the sum of its proper divisors (14760881).

64530205111 is a wasteful number, since it uses less digits than its factorization.

64530205111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14760880.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 64530205111 its reverse (11150203546), we get a palindrome (75680408657).

The spelling of 64530205111 in words is "sixty-four billion, five hundred thirty million, two hundred five thousand, one hundred eleven".