22108859865 has 12 divisors (see below), whose sum is σ = 38322023844. Its totient is φ = 11791391904.

The previous prime is 22108859849. The next prime is 22108859869. The reversal of 22108859865 is 56895880122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3977698761 + 18131161104 = 63069^2 + 134652^2 .

It is not a de Polignac number, because 22108859865 - 2⁴ = 22108859849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22108859869) 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 11 ways as a sum of consecutive naturals, for example, 245653954 + ... + 245654043.

It is an arithmetic number, because the mean of its divisors is an integer number (3193501987).

Almost surely, 2^22108859865 is an apocalyptic number.

It is an amenable number.

22108859865 is a deficient number, since it is larger than the sum of its proper divisors (16213163979).

22108859865 is a wasteful number, since it uses less digits than its factorization.

22108859865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491308008 (or 491308005 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 22108859865 in words is "twenty-two billion, one hundred eight million, eight hundred fifty-nine thousand, eight hundred sixty-five".