22456521809 has 8 divisors (see below), whose sum is σ = 23275489320. Its totient is φ = 21640528000.

The previous prime is 22456521803. The next prime is 22456521823. The reversal of 22456521809 is 90812565422.

It can be written as a sum of positive squares in 4 ways, for example, as 6436050625 + 16020471184 = 80225^2 + 126572^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22456521809 - 2²⁰ = 22455473233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22456521809.

It is not an unprimeable number, because it can be changed into a prime (22456521803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728042 + ... + 758259.

It is an arithmetic number, because the mean of its divisors is an integer number (2909436165).

Almost surely, 2^22456521809 is an apocalyptic number.

22456521809 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22456521809 is a deficient number, since it is larger than the sum of its proper divisors (818967511).

22456521809 is a wasteful number, since it uses less digits than its factorization.

22456521809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486851.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 22456521809 in words is "twenty-two billion, four hundred fifty-six million, five hundred twenty-one thousand, eight hundred nine".