648565425 has 36 divisors (see below), whose sum is σ = 1201721820. Its totient is φ = 333970560.

The previous prime is 648565387. The next prime is 648565447. The reversal of 648565425 is 524565846.

648565425 is a `hidden beast` number, since 6 + 48 + 565 + 42 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 14130081 + 634435344 = 3759^2 + 25188^2 .

It is not a de Polignac number, because 648565425 - 2¹⁶ = 648499889 is a prime.

It is a super-3 number, since 3×648565425³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43174 + ... + 56223.

Almost surely, 2^648565425 is an apocalyptic number.

It is an amenable number.

648565425 is a deficient number, since it is larger than the sum of its proper divisors (553156395).

648565425 is a wasteful number, since it uses less digits than its factorization.

648565425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99442 (or 99434 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 648565425 is about 25466.9476969660. The cubic root of 648565425 is about 865.6013615948.

The spelling of 648565425 in words is "six hundred forty-eight million, five hundred sixty-five thousand, four hundred twenty-five".