648813216876 has 96 divisors (see below), whose sum is σ = 1704686323200. Its totient is φ = 190334707200.

The previous prime is 648813216859. The next prime is 648813216917. The reversal of 648813216876 is 678612318846.

It is a super-2 number, since 2×648813216876² (a number of 24 digits) 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 31 ways as a sum of consecutive naturals, for example, 638136 + ... + 1305696.

It is an arithmetic number, because the mean of its divisors is an integer number (17757149200).

Almost surely, 2^648813216876 is an apocalyptic number.

648813216876 is a gapful number since it is divisible by the number (66) 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 648813216876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852343161600).

648813216876 is an abundant number, since it is smaller than the sum of its proper divisors (1055873106324).

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

648813216876 is a wasteful number, since it uses less digits than its factorization.

648813216876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667815 (or 667813 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The spelling of 648813216876 in words is "six hundred forty-eight billion, eight hundred thirteen million, two hundred sixteen thousand, eight hundred seventy-six".