63921016 has 32 divisors (see below), whose sum is σ = 127958400. Its totient is φ = 29846880.

The previous prime is 63921001. The next prime is 63921019. The reversal of 63921016 is 61012936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63921019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7831 + ... + 13753.

It is an arithmetic number, because the mean of its divisors is an integer number (3998700).

Almost surely, 2^63921016 is an apocalyptic number.

It is an amenable number.

63921016 is an abundant number, since it is smaller than the sum of its proper divisors (64037384).

63921016 is a wasteful number, since it uses less digits than its factorization.

63921016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019 (or 6015 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 63921016 is about 7995.0619759949. The cubic root of 63921016 is about 399.8353822618.

The spelling of 63921016 in words is "sixty-three million, nine hundred twenty-one thousand, sixteen".