646059425 has 12 divisors (see below), whose sum is σ = 873942576. Its totient is φ = 469861200.

The previous prime is 646059383. The next prime is 646059431. The reversal of 646059425 is 524950646.

It is a happy number.

It is not a de Polignac number, because 646059425 - 2¹⁶ = 645993889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1174379 + ... + 1174928.

It is an arithmetic number, because the mean of its divisors is an integer number (72828548).

Almost surely, 2^646059425 is an apocalyptic number.

It is an amenable number.

646059425 is a deficient number, since it is larger than the sum of its proper divisors (227883151).

646059425 is a wasteful number, since it uses less digits than its factorization.

646059425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349328 (or 2349323 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 646059425 is about 25417.6990500714. The cubic root of 646059425 is about 864.4850533018.

The spelling of 646059425 in words is "six hundred forty-six million, fifty-nine thousand, four hundred twenty-five".