647353205480999 has 16 divisors (see below), whose sum is σ = 692353256017920. Its totient is φ = 603927703219680.

The previous prime is 647353205480921. The next prime is 647353205481011. The reversal of 647353205480999 is 999084502353746.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647353205480999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647353205480909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559360847 + ... + 560516960.

It is an arithmetic number, because the mean of its divisors is an integer number (43272078501120).

Almost surely, 2^{647353205480999} is an apocalyptic number.

647353205480999 is a deficient number, since it is larger than the sum of its proper divisors (45000050536921).

647353205480999 is a wasteful number, since it uses less digits than its factorization.

647353205480999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119878510.

The product of its (nonzero) digits is 1763596800, while the sum is 74.

The spelling of 647353205480999 in words is "six hundred forty-seven trillion, three hundred fifty-three billion, two hundred five million, four hundred eighty thousand, nine hundred ninety-nine".