22561641472 has 44 divisors (see below), whose sum is σ = 45500609556. Its totient is φ = 11180933120.

The previous prime is 22561641449. The next prime is 22561641563. The reversal of 22561641472 is 27414616522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1659421696 + 20902219776 = 40736^2 + 144576^2 .

It is a super-2 number, since 2×22561641472² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18222 + ... + 213202.

Almost surely, 2^22561641472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22561641472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22750304778).

22561641472 is an abundant number, since it is smaller than the sum of its proper divisors (22938968084).

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

22561641472 is a wasteful number, since it uses less digits than its factorization.

22561641472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195114 (or 195096 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The spelling of 22561641472 in words is "twenty-two billion, five hundred sixty-one million, six hundred forty-one thousand, four hundred seventy-two".