13222023450644 has 72 divisors (see below), whose sum is σ = 24615705628920. Its totient is φ = 6213021179904.

The previous prime is 13222023450641. The next prime is 13222023450673. The reversal of 13222023450644 is 44605432022231.

It can be written as a sum of positive squares in 12 ways, for example, as 23843065744 + 13198180384900 = 154412^2 + 3632930^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13222023450598 and 13222023450607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13222023450641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3541927802 + ... + 3541931534.

Almost surely, 2^{13222023450644} is an apocalyptic number.

It is an amenable number.

13222023450644 is a deficient number, since it is larger than the sum of its proper divisors (11393682178276).

13222023450644 is a wasteful number, since it uses less digits than its factorization.

13222023450644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437 (or 7418 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 13222023450644 its reverse (44605432022231), we get a palindrome (57827455472875).

The spelling of 13222023450644 in words is "thirteen trillion, two hundred twenty-two billion, twenty-three million, four hundred fifty thousand, six hundred forty-four".