64522243213 has 4 divisors (see below), whose sum is σ = 64856555548. Its totient is φ = 64187930880.

The previous prime is 64522243171. The next prime is 64522243217. The reversal of 64522243213 is 31234222546.

64522243213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36588803524 + 27933439689 = 191282^2 + 167133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64522243213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64522243217) 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, 167155878 + ... + 167156263.

It is an arithmetic number, because the mean of its divisors is an integer number (16214138887).

Almost surely, 2^64522243213 is an apocalyptic number.

It is an amenable number.

64522243213 is a deficient number, since it is larger than the sum of its proper divisors (334312335).

64522243213 is a wasteful number, since it uses less digits than its factorization.

64522243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334312334.

The product of its digits is 69120, while the sum is 34.

Adding to 64522243213 its reverse (31234222546), we get a palindrome (95756465759).

The spelling of 64522243213 in words is "sixty-four billion, five hundred twenty-two million, two hundred forty-three thousand, two hundred thirteen".