646225365 has 32 divisors (see below), whose sum is σ = 1081092096. Its totient is φ = 329003840.

The previous prime is 646225339. The next prime is 646225379. The reversal of 646225365 is 563522646.

646225365 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 646225365 - 2¹¹ = 646223317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200920 + ... + 204110.

It is an arithmetic number, because the mean of its divisors is an integer number (33784128).

Almost surely, 2^646225365 is an apocalyptic number.

It is an amenable number.

646225365 is a deficient number, since it is larger than the sum of its proper divisors (434866731).

646225365 is a wasteful number, since it uses less digits than its factorization.

646225365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809.

The product of its digits is 259200, while the sum is 39.

The square root of 646225365 is about 25420.9631013461. The cubic root of 646225365 is about 864.5590611324.

The spelling of 646225365 in words is "six hundred forty-six million, two hundred twenty-five thousand, three hundred sixty-five".