11856341681719 has 2 divisors, whose sum is σ = 11856341681720. Its totient is φ = 11856341681718.

The previous prime is 11856341681699. The next prime is 11856341681741. The reversal of 11856341681719 is 91718614365811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11856341681719 - 2⁹ = 11856341681207 is a prime.

It is a super-2 number, since 2×11856341681719² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11856341181719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5928170840859 + 5928170840860.

It is an arithmetic number, because the mean of its divisors is an integer number (5928170840860).

Almost surely, 2^{11856341681719} is an apocalyptic number.

11856341681719 is a deficient number, since it is larger than the sum of its proper divisors (1).

11856341681719 is an equidigital number, since it uses as much as digits as its factorization.

11856341681719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 61.

The spelling of 11856341681719 in words is "eleven trillion, eight hundred fifty-six billion, three hundred forty-one million, six hundred eighty-one thousand, seven hundred nineteen".