11861831698217 has 2 divisors, whose sum is σ = 11861831698218. Its totient is φ = 11861831698216.

The previous prime is 11861831698153. The next prime is 11861831698219. The reversal of 11861831698217 is 71289613816811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11861831698201 + 16 = 3444101^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 11861831698217 - 2⁶ = 11861831698153 is a prime.

Together with 11861831698219, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11861831698217.

It is not a weakly prime, because it can be changed into another prime (11861831698219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5930915849108 + 5930915849109.

It is an arithmetic number, because the mean of its divisors is an integer number (5930915849109).

Almost surely, 2^{11861831698217} is an apocalyptic number.

It is an amenable number.

11861831698217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11861831698217 is an equidigital number, since it uses as much as digits as its factorization.

11861831698217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 62.

The spelling of 11861831698217 in words is "eleven trillion, eight hundred sixty-one billion, eight hundred thirty-one million, six hundred ninety-eight thousand, two hundred seventeen".