646005616 has 40 divisors (see below), whose sum is σ = 1289723504. Its totient is φ = 313320960.

The previous prime is 646005611. The next prime is 646005617. The reversal of 646005616 is 616500646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646005611) 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, 66715 + ... + 75781.

Almost surely, 2^646005616 is an apocalyptic number.

It is an amenable number.

646005616 is a deficient number, since it is larger than the sum of its proper divisors (643717888).

646005616 is a wasteful number, since it uses less digits than its factorization.

646005616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9209 (or 9203 counting only the distinct ones).

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

The square root of 646005616 is about 25416.6405333199. The cubic root of 646005616 is about 864.4610522239.

The spelling of 646005616 in words is "six hundred forty-six million, five thousand, six hundred sixteen".