640053425 has 12 divisors (see below), whose sum is σ = 865818096. Its totient is φ = 465493200.

The previous prime is 640053413. The next prime is 640053431. The reversal of 640053425 is 524350046.

It is not a de Polignac number, because 640053425 - 2²² = 635859121 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1163459 + ... + 1164008.

It is an arithmetic number, because the mean of its divisors is an integer number (72151508).

Almost surely, 2^640053425 is an apocalyptic number.

It is an amenable number.

640053425 is a deficient number, since it is larger than the sum of its proper divisors (225764671).

640053425 is a wasteful number, since it uses less digits than its factorization.

640053425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327488 (or 2327483 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 640053425 is about 25299.2771635871. The cubic root of 640053425 is about 861.7978546525.

The spelling of 640053425 in words is "six hundred forty million, fifty-three thousand, four hundred twenty-five".