63664448 has 42 divisors (see below), whose sum is σ = 129664206. Its totient is φ = 31003648.

The previous prime is 63664429. The next prime is 63664451. The reversal of 63664448 is 84446636.

It can be written as a sum of positive squares in 3 ways, for example, as 19998784 + 43665664 = 4472^2 + 6608^2 .

Its product of digits (331776) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 464636 + ... + 464772.

It is an arithmetic number, because the mean of its divisors is an integer number (3087243).

Almost surely, 2^63664448 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 63664448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64832103).

63664448 is an abundant number, since it is smaller than the sum of its proper divisors (65999758).

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

63664448 is an equidigital number, since it uses as much as digits as its factorization.

63664448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 192 counting only the distinct ones).

The product of its digits is 331776, while the sum is 41.

The square root of 63664448 is about 7979.0004386514. Note that the first 3 decimals coincide. The cubic root of 63664448 is about 399.2997080267.

The spelling of 63664448 in words is "sixty-three million, six hundred sixty-four thousand, four hundred forty-eight".