12447788889 has 8 divisors (see below), whose sum is σ = 16698874912. Its totient is φ = 8247614400.

The previous prime is 12447788849. The next prime is 12447788911. The reversal of 12447788889 is 98888774421.

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

It is not a de Polignac number, because 12447788889 - 2¹² = 12447784793 is a prime.

It is a super-2 number, since 2×12447788889² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12447788809) 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, 12727312 + ... + 12728289.

It is an arithmetic number, because the mean of its divisors is an integer number (2087359364).

Almost surely, 2^12447788889 is an apocalyptic number.

It is an amenable number.

12447788889 is a deficient number, since it is larger than the sum of its proper divisors (4251086023).

12447788889 is a wasteful number, since it uses less digits than its factorization.

12447788889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25455767.

The product of its digits is 57802752, while the sum is 66.

The spelling of 12447788889 in words is "twelve billion, four hundred forty-seven million, seven hundred eighty-eight thousand, eight hundred eighty-nine".