63689505 has 16 divisors (see below), whose sum is σ = 111167424. Its totient is φ = 30879680.

The previous prime is 63689491. The next prime is 63689533. The reversal of 63689505 is 50598636.

It is not a de Polignac number, because 63689505 - 2⁵ = 63689473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192834 + ... + 193163.

It is an arithmetic number, because the mean of its divisors is an integer number (6947964).

Almost surely, 2^63689505 is an apocalyptic number.

It is an amenable number.

63689505 is a deficient number, since it is larger than the sum of its proper divisors (47477919).

63689505 is a wasteful number, since it uses less digits than its factorization.

63689505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386016.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 63689505 is about 7980.5704683312. The cubic root of 63689505 is about 399.3520865036.

The spelling of 63689505 in words is "sixty-three million, six hundred eighty-nine thousand, five hundred five".