64443234445 has 16 divisors (see below), whose sum is σ = 77759563248. Its totient is φ = 51270123520.

The previous prime is 64443234407. The next prime is 64443234467. The reversal of 64443234445 is 54443234446.

It can be written as a sum of positive squares in 8 ways, for example, as 4164637156 + 60278597289 = 64534^2 + 245517^2 .

It is not a de Polignac number, because 64443234445 - 2¹¹ = 64443232397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 752205 + ... + 833485.

It is an arithmetic number, because the mean of its divisors is an integer number (4859972703).

Almost surely, 2^64443234445 is an apocalyptic number.

It is an amenable number.

64443234445 is a deficient number, since it is larger than the sum of its proper divisors (13316328803).

64443234445 is a wasteful number, since it uses less digits than its factorization.

64443234445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82160.

The product of its digits is 2211840, while the sum is 43.

Subtracting from 64443234445 its reverse (54443234446), we obtain a palindrome (9999999999).

The spelling of 64443234445 in words is "sixty-four billion, four hundred forty-three million, two hundred thirty-four thousand, four hundred forty-five".