144889636809 has 8 divisors (see below), whose sum is σ = 195061776832. Its totient is φ = 95655294000.

The previous prime is 144889636789. The next prime is 144889636841. The reversal of 144889636809 is 908636988441.

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

It is not a de Polignac number, because 144889636809 - 2¹¹ = 144889634761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144889636809.

It is not an unprimeable number, because it can be changed into a prime (144889634809) 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, 234448942 + ... + 234449559.

It is an arithmetic number, because the mean of its divisors is an integer number (24382722104).

Almost surely, 2^144889636809 is an apocalyptic number.

It is an amenable number.

144889636809 is a deficient number, since it is larger than the sum of its proper divisors (50172140023).

144889636809 is a wasteful number, since it uses less digits than its factorization.

144889636809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468898607.

The product of its (nonzero) digits is 71663616, while the sum is 66.

The spelling of 144889636809 in words is "one hundred forty-four billion, eight hundred eighty-nine million, six hundred thirty-six thousand, eight hundred nine".