647676803659 has 4 divisors (see below), whose sum is σ = 658294456240. Its totient is φ = 637059151080.

The previous prime is 647676803623. The next prime is 647676803663. The reversal of 647676803659 is 956308676746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 647676803659 - 2⁷ = 647676803531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647676803594 and 647676803603.

It is not an unprimeable number, because it can be changed into a prime (647676803699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5308826199 + ... + 5308826320.

It is an arithmetic number, because the mean of its divisors is an integer number (164573614060).

Almost surely, 2^647676803659 is an apocalyptic number.

647676803659 is a deficient number, since it is larger than the sum of its proper divisors (10617652581).

647676803659 is a wasteful number, since it uses less digits than its factorization.

647676803659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617652580.

The product of its (nonzero) digits is 274337280, while the sum is 67.

The spelling of 647676803659 in words is "six hundred forty-seven billion, six hundred seventy-six million, eight hundred three thousand, six hundred fifty-nine".