648673568 has 12 divisors (see below), whose sum is σ = 1277076150. Its totient is φ = 324336768.

The previous prime is 648673549. The next prime is 648673583. The reversal of 648673568 is 865376846.

It can be written as a sum of positive squares in only one way, i.e., 403688464 + 244985104 = 20092^2 + 15652^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135493 + ... + 10135556.

Almost surely, 2^648673568 is an apocalyptic number.

It is an amenable number.

648673568 is a deficient number, since it is larger than the sum of its proper divisors (628402582).

648673568 is a wasteful number, since it uses less digits than its factorization.

648673568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271059 (or 20271051 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 53.

The square root of 648673568 is about 25469.0708114764. The cubic root of 648673568 is about 865.6494695790.

The spelling of 648673568 in words is "six hundred forty-eight million, six hundred seventy-three thousand, five hundred sixty-eight".