648683505 has 16 divisors (see below), whose sum is σ = 1153215360. Its totient is φ = 345964464.

The previous prime is 648683459. The next prime is 648683527. The reversal of 648683505 is 505386846.

648683505 is a `hidden beast` number, since 64 + 8 + 6 + 83 + 505 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-648683505 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2402397 + ... + 2402666.

It is an arithmetic number, because the mean of its divisors is an integer number (72075960).

Almost surely, 2^648683505 is an apocalyptic number.

It is an amenable number.

648683505 is a deficient number, since it is larger than the sum of its proper divisors (504531855).

648683505 is a wasteful number, since it uses less digits than its factorization.

648683505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805077 (or 4805071 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 648683505 is about 25469.2658904806. The cubic root of 648683505 is about 865.6538898376.

The spelling of 648683505 in words is "six hundred forty-eight million, six hundred eighty-three thousand, five hundred five".