648686686846 has 16 divisors (see below), whose sum is σ = 1061501145840. Its totient is φ = 294853740480.

The previous prime is 648686686819. The next prime is 648686686853.

648686686846 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2188930 + ... + 2467546.

It is an arithmetic number, because the mean of its divisors is an integer number (66343821615).

Almost surely, 2^648686686846 is an apocalyptic number.

648686686846 is a deficient number, since it is larger than the sum of its proper divisors (412814458994).

648686686846 is a wasteful number, since it uses less digits than its factorization.

648686686846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384459.

The product of its digits is 3057647616, while the sum is 76.

The spelling of 648686686846 in words is "six hundred forty-eight billion, six hundred eighty-six million, six hundred eighty-six thousand, eight hundred forty-six".