63643040 has 48 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 25355520.

The previous prime is 63643033. The next prime is 63643049. The reversal of 63643040 is 4034636.

63643040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63643049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49121 + ... + 50399.

It is an arithmetic number, because the mean of its divisors is an integer number (3144960).

Almost surely, 2^63643040 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 63643040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75479040).

63643040 is an abundant number, since it is smaller than the sum of its proper divisors (87315040).

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

63643040 is a wasteful number, since it uses less digits than its factorization.

63643040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 63643040 is about 7977.6588044363. The cubic root of 63643040 is about 399.2549464329.

Adding to 63643040 its reverse (4034636), we get a palindrome (67677676).

The spelling of 63643040 in words is "sixty-three million, six hundred forty-three thousand, forty".