53640625 has 14 divisors (see below), whose sum is σ = 67069454. Its totient is φ = 42900000.

The previous prime is 53640599. The next prime is 53640637. The reversal of 53640625 is 52604635.

It can be written as a sum of positive squares in 7 ways, for example, as 52881984 + 758641 = 7272^2 + 871^2 .

It is not a de Polignac number, because 53640625 - 2⁷ = 53640497 is a prime.

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 13 ways as a sum of consecutive naturals, for example, 13909 + ... + 17341.

Almost surely, 2^53640625 is an apocalyptic number.

It is an amenable number.

53640625 is a deficient number, since it is larger than the sum of its proper divisors (13428829).

53640625 is an frugal number, since it uses more digits than its factorization.

53640625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 53640625 is about 7323.9760376451. The cubic root of 53640625 is about 377.1359588617.

The spelling of 53640625 in words is "fifty-three million, six hundred forty thousand, six hundred twenty-five".