22665455440 has 20 divisors (see below), whose sum is σ = 52697184084. Its totient is φ = 9066182144.

The previous prime is 22665455437. The next prime is 22665455447. The reversal of 22665455440 is 4455456622.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15641004096 + 7024451344 = 125064^2 + 83812^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22665455447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141659017 + ... + 141659176.

Almost surely, 2^22665455440 is an apocalyptic number.

22665455440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22665455440 is an abundant number, since it is smaller than the sum of its proper divisors (30031728644).

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

22665455440 is a wasteful number, since it uses less digits than its factorization.

22665455440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283318206 (or 283318200 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 22665455440 in words is "twenty-two billion, six hundred sixty-five million, four hundred fifty-five thousand, four hundred forty".