63609525 has 36 divisors (see below), whose sum is σ = 130210912. Its totient is φ = 29077920.

The previous prime is 63609521. The next prime is 63609547. The reversal of 63609525 is 52590636.

It is not a de Polignac number, because 63609525 - 2² = 63609521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63609525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63609521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18619 + ... + 21768.

Almost surely, 2^63609525 is an apocalyptic number.

It is an amenable number.

63609525 is an abundant number, since it is smaller than the sum of its proper divisors (66601387).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63609525 is a wasteful number, since it uses less digits than its factorization.

63609525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40410 (or 40402 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 63609525 is about 7975.5579742110. The cubic root of 63609525 is about 399.1848503728.

The spelling of 63609525 in words is "sixty-three million, six hundred nine thousand, five hundred twenty-five".