648856813456 has 10 divisors (see below), whose sum is σ = 1257160076102. Its totient is φ = 324428406720.

The previous prime is 648856813391. The next prime is 648856813459. The reversal of 648856813456 is 654318658846.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 631732473856 + 17124339600 = 794816^2 + 130860^2 .

It is not an unprimeable number, because it can be changed into a prime (648856813459) by changing a digit.

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 as a sum of consecutive naturals, namely, 20276775405 + ... + 20276775436.

Almost surely, 2^648856813456 is an apocalyptic number.

It is an amenable number.

648856813456 is a deficient number, since it is larger than the sum of its proper divisors (608303262646).

648856813456 is a wasteful number, since it uses less digits than its factorization.

648856813456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40553550849 (or 40553550843 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 64.

The spelling of 648856813456 in words is "six hundred forty-eight billion, eight hundred fifty-six million, eight hundred thirteen thousand, four hundred fifty-six".