648671776244 has 12 divisors (see below), whose sum is σ = 1137809429568. Its totient is φ = 323583367800.

The previous prime is 648671776241. The next prime is 648671776283. The reversal of 648671776244 is 442677176846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648671776241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188128142 + ... + 188131589.

It is an arithmetic number, because the mean of its divisors is an integer number (94817452464).

Almost surely, 2^648671776244 is an apocalyptic number.

It is an amenable number.

648671776244 is a deficient number, since it is larger than the sum of its proper divisors (489137653324).

648671776244 is a wasteful number, since it uses less digits than its factorization.

648671776244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376260166 (or 376260164 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 62.

The spelling of 648671776244 in words is "six hundred forty-eight billion, six hundred seventy-one million, seven hundred seventy-six thousand, two hundred forty-four".