648461085856 has 24 divisors (see below), whose sum is σ = 1277652900384. Its totient is φ = 323977809600.

The previous prime is 648461085851. The next prime is 648461085859. The reversal of 648461085856 is 658580164846.

It is a happy number.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 648461085794 and 648461085803.

It is not an unprimeable number, because it can be changed into a prime (648461085851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7856220 + ... + 7938331.

It is an arithmetic number, because the mean of its divisors is an integer number (53235537516).

Almost surely, 2^648461085856 is an apocalyptic number.

It is an amenable number.

648461085856 is a deficient number, since it is larger than the sum of its proper divisors (629191814528).

648461085856 is a wasteful number, since it uses less digits than its factorization.

648461085856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795844 (or 15795836 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 61.

The spelling of 648461085856 in words is "six hundred forty-eight billion, four hundred sixty-one million, eighty-five thousand, eight hundred fifty-six".