646423225 has 24 divisors (see below), whose sum is σ = 964293440. Its totient is φ = 419929920.

The previous prime is 646423213. The next prime is 646423259. The reversal of 646423225 is 522324646.

646423225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646423225 - 2⁹ = 646422713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93882 + ... + 100531.

Almost surely, 2^646423225 is an apocalyptic number.

It is an amenable number.

646423225 is a deficient number, since it is larger than the sum of its proper divisors (317870215).

646423225 is a wasteful number, since it uses less digits than its factorization.

646423225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194449 (or 194444 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 646423225 is about 25424.8544735265. The cubic root of 646423225 is about 864.6472884546.

The spelling of 646423225 in words is "six hundred forty-six million, four hundred twenty-three thousand, two hundred twenty-five".