63915648 has 64 divisors (see below), whose sum is σ = 179781120. Its totient is φ = 20049920.

The previous prime is 63915637. The next prime is 63915737. The reversal of 63915648 is 84651936.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×63915648³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (2809080).

Almost surely, 2^63915648 is an apocalyptic number.

63915648 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63915648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89890560).

63915648 is an abundant number, since it is smaller than the sum of its proper divisors (115865472).

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

63915648 is a wasteful number, since it uses less digits than its factorization.

63915648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9825 (or 9813 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 63915648 is about 7994.7262617303. The cubic root of 63915648 is about 399.8241894046.

The spelling of 63915648 in words is "sixty-three million, nine hundred fifteen thousand, six hundred forty-eight".