63563965 has 8 divisors (see below), whose sum is σ = 78338520. Its totient is φ = 49476672.

The previous prime is 63563963. The next prime is 63563989. The reversal of 63563965 is 56936536.

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 60388441 = 1782^2 + 7771^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 63563965 - 2¹ = 63563963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63563963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171610 + ... + 171979.

It is an arithmetic number, because the mean of its divisors is an integer number (9792315).

Almost surely, 2^63563965 is an apocalyptic number.

It is an amenable number.

63563965 is a deficient number, since it is larger than the sum of its proper divisors (14774555).

63563965 is a wasteful number, since it uses less digits than its factorization.

63563965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343631.

The product of its digits is 437400, while the sum is 43.

The square root of 63563965 is about 7972.7012360931. The cubic root of 63563965 is about 399.0895229010.

The spelling of 63563965 in words is "sixty-three million, five hundred sixty-three thousand, nine hundred sixty-five".