22566555648 has 702 divisors, whose sum is σ = 84378619962. Its totient is φ = 5759631360.

The previous prime is 22566555647. The next prime is 22566555653. The reversal of 22566555648 is 84655566522.

22566555648 is a `hidden beast` number, since 2 + 25 + 6 + 6 + 55 + 564 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15623000064 + 6943555584 = 124992^2 + 83328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22566555594 and 22566555603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22566555647) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 727953393 + ... + 727953423.

Almost surely, 2^22566555648 is an apocalyptic number.

22566555648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22566555648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42189309981).

22566555648 is an abundant number, since it is smaller than the sum of its proper divisors (61812064314).

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

22566555648 is a wasteful number, since it uses less digits than its factorization.

22566555648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 56 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 54.

The spelling of 22566555648 in words is "twenty-two billion, five hundred sixty-six million, five hundred fifty-five thousand, six hundred forty-eight".