63639552 has 52 divisors (see below), whose sum is σ = 169717520. Its totient is φ = 21209088.

The previous prime is 63639547. The next prime is 63639577. The reversal of 63639552 is 25593636.

It is a self number, because there is not a number n which added to its sum of digits gives 63639552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9699 + ... + 14877.

Almost surely, 2^63639552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63639552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84858760).

63639552 is an abundant number, since it is smaller than the sum of its proper divisors (106077968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63639552 is an equidigital number, since it uses as much as digits as its factorization.

63639552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206 (or 5184 counting only the distinct ones).

The product of its digits is 145800, while the sum is 39.

The square root of 63639552 is about 7977.4401909384. The cubic root of 63639552 is about 399.2476524869.

The spelling of 63639552 in words is "sixty-three million, six hundred thirty-nine thousand, five hundred fifty-two".