64331646 has 16 divisors (see below), whose sum is σ = 128747664. Its totient is φ = 21429824.

The previous prime is 64331639. The next prime is 64331671. The reversal of 64331646 is 64613346.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11026 + ... + 15818.

It is an arithmetic number, because the mean of its divisors is an integer number (8046729).

Almost surely, 2^64331646 is an apocalyptic number.

64331646 is an abundant number, since it is smaller than the sum of its proper divisors (64416018).

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

64331646 is a wasteful number, since it uses less digits than its factorization.

64331646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7035.

The product of its digits is 31104, while the sum is 33.

The square root of 64331646 is about 8020.7010915505. The cubic root of 64331646 is about 400.6897391329.

The spelling of 64331646 in words is "sixty-four million, three hundred thirty-one thousand, six hundred forty-six".