647855558683 has 2 divisors, whose sum is σ = 647855558684. Its totient is φ = 647855558682.

The previous prime is 647855558671. The next prime is 647855558783. The reversal of 647855558683 is 386855558746.

647855558683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647855558683 is a prime.

It is not a weakly prime, because it can be changed into another prime (647855558783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323927779341 + 323927779342.

It is an arithmetic number, because the mean of its divisors is an integer number (323927779342).

Almost surely, 2^647855558683 is an apocalyptic number.

647855558683 is a deficient number, since it is larger than the sum of its proper divisors (1).

647855558683 is an equidigital number, since it uses as much as digits as its factorization.

647855558683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680000, while the sum is 70.

The spelling of 647855558683 in words is "six hundred forty-seven billion, eight hundred fifty-five million, five hundred fifty-eight thousand, six hundred eighty-three".