13644421206 has 32 divisors (see below), whose sum is σ = 29437642080. Its totient is φ = 4191189504.

The previous prime is 13644421199. The next prime is 13644421229. The reversal of 13644421206 is 60212444631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101241 + ... + 193748.

It is an arithmetic number, because the mean of its divisors is an integer number (919926315).

Almost surely, 2^13644421206 is an apocalyptic number.

13644421206 is an abundant number, since it is smaller than the sum of its proper divisors (15793220874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13644421206 is a wasteful number, since it uses less digits than its factorization.

13644421206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295600.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 13644421206 its reverse (60212444631), we get a palindrome (73856865837).

The spelling of 13644421206 in words is "thirteen billion, six hundred forty-four million, four hundred twenty-one thousand, two hundred six".