64243365233 has 4 divisors (see below), whose sum is σ = 64243937280. Its totient is φ = 64242793188.

The previous prime is 64243365229. The next prime is 64243365247. The reversal of 64243365233 is 33256334246.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64243365233 - 2² = 64243365229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64243365133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55793 + ... + 362766.

It is an arithmetic number, because the mean of its divisors is an integer number (16060984320).

Almost surely, 2^64243365233 is an apocalyptic number.

It is an amenable number.

64243365233 is a deficient number, since it is larger than the sum of its proper divisors (572047).

64243365233 is a wasteful number, since it uses less digits than its factorization.

64243365233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572046.

The product of its digits is 933120, while the sum is 41.

Adding to 64243365233 its reverse (33256334246), we get a palindrome (97499699479).

The spelling of 64243365233 in words is "sixty-four billion, two hundred forty-three million, three hundred sixty-five thousand, two hundred thirty-three".