13001644225 has 12 divisors (see below), whose sum is σ = 16326117760. Its totient is φ = 10269651600.

The previous prime is 13001644223. The next prime is 13001644261. The reversal of 13001644225 is 52244610031.

It is not a de Polignac number, because 13001644225 - 2¹ = 13001644223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13001644193 and 13001644202.

It is not an unprimeable number, because it can be changed into a prime (13001644223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3289581 + ... + 3293530.

Almost surely, 2^13001644225 is an apocalyptic number.

It is an amenable number.

13001644225 is a deficient number, since it is larger than the sum of its proper divisors (3324473535).

13001644225 is an equidigital number, since it uses as much as digits as its factorization.

13001644225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6583200 (or 6583195 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 13001644225 in words is "thirteen billion, one million, six hundred forty-four thousand, two hundred twenty-five".