648864670 has 32 divisors (see below), whose sum is σ = 1239300000. Its totient is φ = 243757056.

The previous prime is 648864659. The next prime is 648864709. The reversal of 648864670 is 76468846.

It is a congruent number.

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, 81006 + ... + 88654.

It is an arithmetic number, because the mean of its divisors is an integer number (38728125).

Almost surely, 2^648864670 is an apocalyptic number.

648864670 is a deficient number, since it is larger than the sum of its proper divisors (590435330).

648864670 is a wasteful number, since it uses less digits than its factorization.

648864670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The square root of 648864670 is about 25472.8221836529. The cubic root of 648864670 is about 865.7344692411.

The spelling of 648864670 in words is "six hundred forty-eight million, eight hundred sixty-four thousand, six hundred seventy".