63891552 has 48 divisors (see below), whose sum is σ = 168687792. Its totient is φ = 21173760.

The previous prime is 63891533. The next prime is 63891613. The reversal of 63891552 is 25519836.

63891552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 63891552.

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, 15538 + ... + 19214.

It is an arithmetic number, because the mean of its divisors is an integer number (3514329).

Almost surely, 2^63891552 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 63891552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84343896).

63891552 is an abundant number, since it is smaller than the sum of its proper divisors (104796240).

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

63891552 is a wasteful number, since it uses less digits than its factorization.

With its successor (63891553) it forms an eRAP, since the sums of their prime factors are consecutive (3871 and 3872).

63891552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871 (or 3863 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 63891552 is about 7993.2191262344. The cubic root of 63891552 is about 399.7739389317.

The spelling of 63891552 in words is "sixty-three million, eight hundred ninety-one thousand, five hundred fifty-two".