648812813632 has 14 divisors (see below), whose sum is σ = 1287487927178. Its totient is φ = 324406406784.

The previous prime is 648812813629. The next prime is 648812813657. The reversal of 648812813632 is 236318218846.

It can be written as a sum of positive squares in only one way, i.e., 597689794816 + 51123018816 = 773104^2 + 226104^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 648812813632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5068850043 + ... + 5068850170.

Almost surely, 2^648812813632 is an apocalyptic number.

It is an amenable number.

648812813632 is a deficient number, since it is larger than the sum of its proper divisors (638675113546).

648812813632 is a wasteful number, since it uses less digits than its factorization.

648812813632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10137700225 (or 10137700215 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The spelling of 648812813632 in words is "six hundred forty-eight billion, eight hundred twelve million, eight hundred thirteen thousand, six hundred thirty-two".