22643647488 has 528 divisors, whose sum is σ = 86357591424. Its totient is φ = 5532549120.

The previous prime is 22643647483. The next prime is 22643647489. The reversal of 22643647488 is 88474634622.

22643647488 is a `hidden beast` number, since 2 + 2 + 64 + 36 + 474 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (528).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (22643647483) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12062806 + ... + 12064682.

Almost surely, 2^22643647488 is an apocalyptic number.

22643647488 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 22643647488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43178795712).

22643647488 is an abundant number, since it is smaller than the sum of its proper divisors (63713943936).

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

22643647488 is a wasteful number, since it uses less digits than its factorization.

22643647488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1917 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 54.

The spelling of 22643647488 in words is "twenty-two billion, six hundred forty-three million, six hundred forty-seven thousand, four hundred eighty-eight".