646441516 has 72 divisors (see below), whose sum is σ = 1351365120. Its totient is φ = 269706528.

The previous prime is 646441483. The next prime is 646441517. The reversal of 646441516 is 615144646.

646441516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (646441517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1284921 + ... + 1285423.

It is an arithmetic number, because the mean of its divisors is an integer number (18768960).

Almost surely, 2^646441516 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 646441516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675682560).

646441516 is an abundant number, since it is smaller than the sum of its proper divisors (704923604).

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

646441516 is a wasteful number, since it uses less digits than its factorization.

646441516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 674 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 646441516 is about 25425.2141780556. The cubic root of 646441516 is about 864.6554436455.

The spelling of 646441516 in words is "six hundred forty-six million, four hundred forty-one thousand, five hundred sixteen".