44423655387809 has 4 divisors (see below), whose sum is σ = 44424338925204. Its totient is φ = 44422971850416.

The previous prime is 44423655387791. The next prime is 44423655387829. The reversal of 44423655387809 is 90878355632444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20892395472400 + 23531259915409 = 4570820^2 + 4850903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44423655387809 is a prime.

It is a super-2 number, since 2×44423655387809² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44423655387829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341671202 + ... + 341801195.

It is an arithmetic number, because the mean of its divisors is an integer number (11106084731301).

Almost surely, 2^{44423655387809} is an apocalyptic number.

It is an amenable number.

44423655387809 is a deficient number, since it is larger than the sum of its proper divisors (683537395).

44423655387809 is an equidigital number, since it uses as much as digits as its factorization.

44423655387809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683537394.

The product of its (nonzero) digits is 696729600, while the sum is 68.

The spelling of 44423655387809 in words is "forty-four trillion, four hundred twenty-three billion, six hundred fifty-five million, three hundred eighty-seven thousand, eight hundred nine".