6385409725 has 12 divisors (see below), whose sum is σ = 7926246036. Its totient is φ = 5102948480.

The previous prime is 6385409711. The next prime is 6385409731. The reversal of 6385409725 is 5279045836.

It can be written as a sum of positive squares in 6 ways, for example, as 65318724 + 6320091001 = 8082^2 + 79499^2 .

It is not a de Polignac number, because 6385409725 - 2⁹ = 6385409213 is a prime.

It is a super-2 number, since 2×6385409725² = 81546914712249151250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110182 + ... + 157831.

It is an arithmetic number, because the mean of its divisors is an integer number (660520503).

Almost surely, 2^6385409725 is an apocalyptic number.

It is an amenable number.

6385409725 is a deficient number, since it is larger than the sum of its proper divisors (1540836311).

6385409725 is a wasteful number, since it uses less digits than its factorization.

6385409725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268976 (or 268971 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

The square root of 6385409725 is about 79908.7587502146. The cubic root of 6385409725 is about 1855.2235837477.

The spelling of 6385409725 in words is "six billion, three hundred eighty-five million, four hundred nine thousand, seven hundred twenty-five".