63538561 has 8 divisors (see below), whose sum is σ = 67189248. Its totient is φ = 59988000.

The previous prime is 63538547. The next prime is 63538577. The reversal of 63538561 is 16583536.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63538561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63538561.

It is not an unprimeable number, because it can be changed into a prime (63538861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23725 + ... + 26266.

It is an arithmetic number, because the mean of its divisors is an integer number (8398656).

Almost surely, 2^63538561 is an apocalyptic number.

It is an amenable number.

63538561 is a deficient number, since it is larger than the sum of its proper divisors (3650687).

63538561 is a wasteful number, since it uses less digits than its factorization.

63538561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50063.

The product of its digits is 64800, while the sum is 37.

The square root of 63538561 is about 7971.1078903751. The cubic root of 63538561 is about 399.0363490565.

The spelling of 63538561 in words is "sixty-three million, five hundred thirty-eight thousand, five hundred sixty-one".