648804819320 has 256 divisors, whose sum is σ = 1765131264000. Its totient is φ = 214314992640.

The previous prime is 648804819317. The next prime is 648804819379. The reversal of 648804819320 is 23918408846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 99096287 + ... + 99102833.

It is an arithmetic number, because the mean of its divisors is an integer number (6895044000).

Almost surely, 2^648804819320 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 648804819320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882565632000).

648804819320 is an abundant number, since it is smaller than the sum of its proper divisors (1116326444680).

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

648804819320 is a wasteful number, since it uses less digits than its factorization.

648804819320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843 (or 6825 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 648804819320 in words is "six hundred forty-eight billion, eight hundred four million, eight hundred nineteen thousand, three hundred twenty".