5631985710217 has 2 divisors, whose sum is σ = 5631985710218. Its totient is φ = 5631985710216.

The previous prime is 5631985710209. The next prime is 5631985710257. The reversal of 5631985710217 is 7120175891365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3665677843216 + 1966307867001 = 1914596^2 + 1402251^2 .

It is a cyclic number.

It is not a de Polignac number, because 5631985710217 - 2³ = 5631985710209 is a prime.

It is not a weakly prime, because it can be changed into another prime (5631985710257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2815992855108 + 2815992855109.

It is an arithmetic number, because the mean of its divisors is an integer number (2815992855109).

Almost surely, 2^{5631985710217} is an apocalyptic number.

It is an amenable number.

5631985710217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5631985710217 is an equidigital number, since it uses as much as digits as its factorization.

5631985710217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 5631985710217 in words is "five trillion, six hundred thirty-one billion, nine hundred eighty-five million, seven hundred ten thousand, two hundred seventeen".