64243234533 has 4 divisors (see below), whose sum is σ = 85657646048. Its totient is φ = 42828823020.

The previous prime is 64243234513. The next prime is 64243234537. The reversal of 64243234533 is 33543234246.

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 not a de Polignac number, because 64243234533 - 2¹² = 64243230437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64243234491 and 64243234500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64243234537) 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, 10707205753 + ... + 10707205758.

It is an arithmetic number, because the mean of its divisors is an integer number (21414411512).

Almost surely, 2^64243234533 is an apocalyptic number.

It is an amenable number.

64243234533 is a deficient number, since it is larger than the sum of its proper divisors (21414411515).

64243234533 is a wasteful number, since it uses less digits than its factorization.

64243234533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21414411514.

The product of its digits is 622080, while the sum is 39.

Adding to 64243234533 its reverse (33543234246), we get a palindrome (97786468779).

The spelling of 64243234533 in words is "sixty-four billion, two hundred forty-three million, two hundred thirty-four thousand, five hundred thirty-three".