22440774636 has 144 divisors (see below), whose sum is σ = 67006937088. Its totient is φ = 6196780800.

The previous prime is 22440774607. The next prime is 22440774637. The reversal of 22440774636 is 63647704422.

22440774636 is a `hidden beast` number, since 2 + 2 + 4 + 4 + 0 + 7 + 7 + 4 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 22440774591 and 22440774600.

It is not an unprimeable number, because it can be changed into a prime (22440774637) 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, 8521576 + ... + 8524208.

It is an arithmetic number, because the mean of its divisors is an integer number (465325952).

Almost surely, 2^22440774636 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 22440774636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33503468544).

22440774636 is an abundant number, since it is smaller than the sum of its proper divisors (44566162452).

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

22440774636 is a wasteful number, since it uses less digits than its factorization.

22440774636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772 (or 3767 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 45.

The spelling of 22440774636 in words is "twenty-two billion, four hundred forty million, seven hundred seventy-four thousand, six hundred thirty-six".