63916640 has 48 divisors (see below), whose sum is σ = 152854128. Its totient is φ = 25253376.

The previous prime is 63916631. The next prime is 63916681. The reversal of 63916640 is 4661936.

63916640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 63916640.

It is a congruent number.

It is an unprimeable number.

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, 10874 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (3184461).

Almost surely, 2^63916640 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 63916640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76427064).

63916640 is an abundant number, since it is smaller than the sum of its proper divisors (88937488).

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

63916640 is a wasteful number, since it uses less digits than its factorization.

63916640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 63916640 is about 7994.7883023880. The cubic root of 63916640 is about 399.8262578784.

It can be divided in two parts, 6391 and 6640, that added together give a palindrome (13031).

The spelling of 63916640 in words is "sixty-three million, nine hundred sixteen thousand, six hundred forty".