64631016 has 96 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 20711040.

The previous prime is 64630987. The next prime is 64631029. The reversal of 64631016 is 61013646.

64631016 is a `hidden beast` number, since 646 + 3 + 1 + 0 + 16 = 666.

64631016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 240130 + ... + 240398.

It is an arithmetic number, because the mean of its divisors is an integer number (1895400).

Almost surely, 2^64631016 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 64631016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90979200).

64631016 is an abundant number, since it is smaller than the sum of its proper divisors (117327384).

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

64631016 is a wasteful number, since it uses less digits than its factorization.

64631016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 64631016 is about 8039.3417640998. The cubic root of 64631016 is about 401.3103196358.

The spelling of 64631016 in words is "sixty-four million, six hundred thirty-one thousand, sixteen".