63642525 has 12 divisors (see below), whose sum is σ = 105222432. Its totient is φ = 33942640.

The previous prime is 63642521. The next prime is 63642529. The reversal of 63642525 is 52524636.

It is an interprime number because it is at equal distance from previous prime (63642521) and next prime (63642529).

It is not a de Polignac number, because 63642525 - 2² = 63642521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63642521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424209 + ... + 424358.

It is an arithmetic number, because the mean of its divisors is an integer number (8768536).

Almost surely, 2^63642525 is an apocalyptic number.

It is an amenable number.

63642525 is a deficient number, since it is larger than the sum of its proper divisors (41579907).

63642525 is a wasteful number, since it uses less digits than its factorization.

63642525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848580 (or 848575 counting only the distinct ones).

The product of its digits is 43200, while the sum is 33.

The square root of 63642525 is about 7977.6265267309. The cubic root of 63642525 is about 399.2538695053.

The spelling of 63642525 in words is "sixty-three million, six hundred forty-two thousand, five hundred twenty-five".