649208863366 has 16 divisors (see below), whose sum is σ = 1113564393504. Its totient is φ = 278073641664.

The previous prime is 649208863343. The next prime is 649208863397. The reversal of 649208863366 is 663368802946.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13201945 + ... + 13251028.

It is an arithmetic number, because the mean of its divisors is an integer number (69597774594).

Almost surely, 2^649208863366 is an apocalyptic number.

649208863366 is a deficient number, since it is larger than the sum of its proper divisors (464355530138).

649208863366 is a wasteful number, since it uses less digits than its factorization.

649208863366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26454735.

The product of its (nonzero) digits is 53747712, while the sum is 61.

The spelling of 649208863366 in words is "six hundred forty-nine billion, two hundred eight million, eight hundred sixty-three thousand, three hundred sixty-six".