648945216 has 112 divisors (see below), whose sum is σ = 2020092480. Its totient is φ = 203581440.

The previous prime is 648945163. The next prime is 648945221. The reversal of 648945216 is 612549846.

It is a super-2 number, since 2×648945216² = 842259786738573312, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 18331 + ... + 40421.

It is an arithmetic number, because the mean of its divisors is an integer number (18036540).

Almost surely, 2^648945216 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 648945216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010046240).

648945216 is an abundant number, since it is smaller than the sum of its proper divisors (1371147264).

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

648945216 is a wasteful number, since it uses less digits than its factorization.

648945216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22129 (or 22113 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 648945216 is about 25474.4031529691. The cubic root of 648945216 is about 865.7702900456.

The spelling of 648945216 in words is "six hundred forty-eight million, nine hundred forty-five thousand, two hundred sixteen".