648683249770 has 8 divisors (see below), whose sum is σ = 1167629849604. Its totient is φ = 259473299904.

The previous prime is 648683249759. The next prime is 648683249789. The reversal of 648683249770 is 77942386846.

It can be written as a sum of positive squares in 2 ways, for example, as 574338138201 + 74345111569 = 757851^2 + 272663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32434162479 + ... + 32434162498.

Almost surely, 2^648683249770 is an apocalyptic number.

648683249770 is a deficient number, since it is larger than the sum of its proper divisors (518946599834).

648683249770 is a wasteful number, since it uses less digits than its factorization.

648683249770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64868324984.

The product of its (nonzero) digits is 97542144, while the sum is 64.

The spelling of 648683249770 in words is "six hundred forty-eight billion, six hundred eighty-three million, two hundred forty-nine thousand, seven hundred seventy".