6447805325 has 24 divisors (see below), whose sum is σ = 9063482400. Its totient is φ = 4510848960.

The previous prime is 6447805297. The next prime is 6447805327. The reversal of 6447805325 is 5235087446.

6447805325 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6447805325 - 2⁸ = 6447805069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447805327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515915 + ... + 528264.

It is an arithmetic number, because the mean of its divisors is an integer number (377645100).

Almost surely, 2^6447805325 is an apocalyptic number.

6447805325 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6447805325 is a deficient number, since it is larger than the sum of its proper divisors (2615677075).

6447805325 is a wasteful number, since it uses less digits than its factorization.

6447805325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044221 (or 1044216 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 44.

The square root of 6447805325 is about 80298.2274088289. The cubic root of 6447805325 is about 1861.2468347411.

The spelling of 6447805325 in words is "six billion, four hundred forty-seven million, eight hundred five thousand, three hundred twenty-five".