648735500 has 72 divisors (see below), whose sum is σ = 1648221120. Its totient is φ = 222415200.

The previous prime is 648735491. The next prime is 648735523. The reversal of 648735500 is 5537846.

648735500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11261 + ... + 37739.

It is an arithmetic number, because the mean of its divisors is an integer number (22891960).

Almost surely, 2^648735500 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 648735500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824110560).

648735500 is an abundant number, since it is smaller than the sum of its proper divisors (999485620).

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

648735500 is a wasteful number, since it uses less digits than its factorization.

648735500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26512 (or 26493 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 648735500 is about 25470.2866100874. The cubic root of 648735500 is about 865.6770179482.

The spelling of 648735500 in words is "six hundred forty-eight million, seven hundred thirty-five thousand, five hundred".