12911602208 has 54 divisors (see below), whose sum is σ = 25976923749. Its totient is φ = 6317281152.

The previous prime is 12911602189. The next prime is 12911602229. The reversal of 12911602208 is 80220611921.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 12247406224 + 664195984 = 110668^2 + 25772^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=80348.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34067363 + ... + 34067741.

Almost surely, 2^12911602208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12911602208

12911602208 is an abundant number, since it is smaller than the sum of its proper divisors (13065321541).

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

12911602208 is an frugal number, since it uses more digits than its factorization.

12911602208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

Multiplying 12911602208 by its sum of digits (32), we get a square (413171270656 = 642784²).

12911602208 divided by its sum of digits (32) gives a square (403487569 = 20087²).

The spelling of 12911602208 in words is "twelve billion, nine hundred eleven million, six hundred two thousand, two hundred eight".