648614450808 has 192 divisors, whose sum is σ = 1982165852160. Its totient is φ = 190497973248.

The previous prime is 648614450797. The next prime is 648614450837. The reversal of 648614450808 is 808054416846.

It is a happy number.

648614450808 is a `hidden beast` number, since 64 + 8 + 61 + 445 + 0 + 80 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1078041 + ... + 1568247.

It is an arithmetic number, because the mean of its divisors is an integer number (10323780480).

Almost surely, 2^648614450808 is an apocalyptic number.

648614450808 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648614450808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991082926080).

648614450808 is an abundant number, since it is smaller than the sum of its proper divisors (1333551401352).

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

648614450808 is a wasteful number, since it uses less digits than its factorization.

648614450808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490306 (or 490299 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 648614450808 in words is "six hundred forty-eight billion, six hundred fourteen million, four hundred fifty thousand, eight hundred eight".