22264440644 has 6 divisors (see below), whose sum is σ = 38962771134. Its totient is φ = 11132220320.

The previous prime is 22264440631. The next prime is 22264440683. The reversal of 22264440644 is 44604446222.

It can be written as a sum of positive squares in only one way, i.e., 20888920900 + 1375519744 = 144530^2 + 37088^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22264440598 and 22264440607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783055077 + ... + 2783055084.

It is an arithmetic number, because the mean of its divisors is an integer number (6493795189).

Almost surely, 2^22264440644 is an apocalyptic number.

It is an amenable number.

22264440644 is a deficient number, since it is larger than the sum of its proper divisors (16698330490).

22264440644 is a wasteful number, since it uses less digits than its factorization.

22264440644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566110165 (or 5566110163 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 38.

Adding to 22264440644 its reverse (44604446222), we get a palindrome (66868886866).

The spelling of 22264440644 in words is "twenty-two billion, two hundred sixty-four million, four hundred forty thousand, six hundred forty-four".