647860898677361 has 2 divisors, whose sum is σ = 647860898677362. Its totient is φ = 647860898677360.

The previous prime is 647860898677283. The next prime is 647860898677519. The reversal of 647860898677361 is 163776898068746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557663502010000 + 90197396667361 = 23614900^2 + 9497231^2 .

It is a cyclic number.

It is not a de Polignac number, because 647860898677361 - 2¹⁰ = 647860898676337 is a prime.

It is not a weakly prime, because it can be changed into another prime (647860898677261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323930449338680 + 323930449338681.

It is an arithmetic number, because the mean of its divisors is an integer number (323930449338681).

Almost surely, 2^{647860898677361} is an apocalyptic number.

It is an amenable number.

647860898677361 is a deficient number, since it is larger than the sum of its proper divisors (1).

647860898677361 is an equidigital number, since it uses as much as digits as its factorization.

647860898677361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24580620288, while the sum is 86.

The spelling of 647860898677361 in words is "six hundred forty-seven trillion, eight hundred sixty billion, eight hundred ninety-eight million, six hundred seventy-seven thousand, three hundred sixty-one".