13022255644 has 48 divisors (see below), whose sum is σ = 25056218880. Its totient is φ = 5894380800.

The previous prime is 13022255639. The next prime is 13022255647. The reversal of 13022255644 is 44655222031.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13022255647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2096247 + ... + 2102449.

It is an arithmetic number, because the mean of its divisors is an integer number (522004560).

Almost surely, 2^13022255644 is an apocalyptic number.

It is an amenable number.

13022255644 is a deficient number, since it is larger than the sum of its proper divisors (12033963236).

13022255644 is a wasteful number, since it uses less digits than its factorization.

13022255644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450 (or 7448 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 13022255644 its reverse (44655222031), we get a palindrome (57677477675).

The spelling of 13022255644 in words is "thirteen billion, twenty-two million, two hundred fifty-five thousand, six hundred forty-four".