22279144644 has 27 divisors (see below), whose sum is σ = 56318990637. Its totient is φ = 7426083024.

The previous prime is 22279144637. The next prime is 22279144651. The reversal of 22279144644 is 44644197222.

The square root of 22279144644 is 149262.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (22279144637) and next prime (22279144651).

It can be written as a sum of positive squares in only one way, i.e., 44756100 + 22234388544 = 6690^2 + 149112^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22279144644.

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 8 ways as a sum of consecutive naturals, for example, 883134 + ... + 908010.

Almost surely, 2^22279144644 is an apocalyptic number.

22279144644 is the 149262-nd square number.

It is an amenable number.

22279144644 is an abundant number, since it is smaller than the sum of its proper divisors (34039845993).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22279144644 is an frugal number, since it uses more digits than its factorization.

22279144644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49764 (or 24882 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The spelling of 22279144644 in words is "twenty-two billion, two hundred seventy-nine million, one hundred forty-four thousand, six hundred forty-four".