63565984 has 12 divisors (see below), whose sum is σ = 125145594. Its totient is φ = 31782976.

The previous prime is 63565981. The next prime is 63565987. The reversal of 63565984 is 48956536.

It is an interprime number because it is at equal distance from previous prime (63565981) and next prime (63565987).

It can be written as a sum of positive squares in only one way, i.e., 33315984 + 30250000 = 5772^2 + 5500^2 .

It is not an unprimeable number, because it can be changed into a prime (63565981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993187 + ... + 993250.

Almost surely, 2^63565984 is an apocalyptic number.

It is an amenable number.

63565984 is a deficient number, since it is larger than the sum of its proper divisors (61579610).

63565984 is a wasteful number, since it uses less digits than its factorization.

63565984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986447 (or 1986439 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The square root of 63565984 is about 7972.8278546573. The cubic root of 63565984 is about 399.0937483204.

The spelling of 63565984 in words is "sixty-three million, five hundred sixty-five thousand, nine hundred eighty-four".