648354618 has 48 divisors (see below), whose sum is σ = 1484342496. Its totient is φ = 212032080.

The previous prime is 648354611. The next prime is 648354631. The reversal of 648354618 is 816453846.

648354618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (648354611) 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, 13173 + ... + 38343.

It is an arithmetic number, because the mean of its divisors is an integer number (30923802).

Almost surely, 2^648354618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648354618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742171248).

648354618 is an abundant number, since it is smaller than the sum of its proper divisors (835987878).

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

648354618 is a wasteful number, since it uses less digits than its factorization.

648354618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25241 (or 25229 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 648354618 is about 25462.8085253768. The cubic root of 648354618 is about 865.5075676134.

The spelling of 648354618 in words is "six hundred forty-eight million, three hundred fifty-four thousand, six hundred eighteen".