63321856 has 72 divisors (see below), whose sum is σ = 139073760. Its totient is φ = 28594176.

The previous prime is 63321833. The next prime is 63321859. The reversal of 63321856 is 65812336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63321859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176205 + ... + 176563.

It is an arithmetic number, because the mean of its divisors is an integer number (1931580).

Almost surely, 2^63321856 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 63321856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69536880).

63321856 is an abundant number, since it is smaller than the sum of its proper divisors (75751904).

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

63321856 is a wasteful number, since it uses less digits than its factorization.

63321856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 427 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 63321856 is about 7957.5031259812. The cubic root of 63321856 is about 398.5821804067.

The spelling of 63321856 in words is "sixty-three million, three hundred twenty-one thousand, eight hundred fifty-six".