63525565 has 4 divisors (see below), whose sum is σ = 76230684. Its totient is φ = 50820448.

The previous prime is 63525557. The next prime is 63525571. The reversal of 63525565 is 56552536.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45454564 + 18071001 = 6742^2 + 4251^2 .

It is a cyclic number.

It is not a de Polignac number, because 63525565 - 2³ = 63525557 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 3 ways as a sum of consecutive naturals, for example, 6352552 + ... + 6352561.

It is an arithmetic number, because the mean of its divisors is an integer number (19057671).

Almost surely, 2^63525565 is an apocalyptic number.

It is an amenable number.

63525565 is a deficient number, since it is larger than the sum of its proper divisors (12705119).

63525565 is a wasteful number, since it uses less digits than its factorization.

63525565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12705118.

The product of its digits is 135000, while the sum is 37.

The square root of 63525565 is about 7970.2926546018. The cubic root of 63525565 is about 399.0091412742.

The spelling of 63525565 in words is "sixty-three million, five hundred twenty-five thousand, five hundred sixty-five".