841400111681 has 2 divisors, whose sum is σ = 841400111682. Its totient is φ = 841400111680.

The previous prime is 841400111659. The next prime is 841400111687. The reversal of 841400111681 is 186111004148.

841400111681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473213289025 + 368186822656 = 687905^2 + 606784^2 .

It is a cyclic number.

It is not a de Polignac number, because 841400111681 - 2²² = 841395917377 is a prime.

It is a super-2 number, since 2×841400111681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (841400111687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420700055840 + 420700055841.

It is an arithmetic number, because the mean of its divisors is an integer number (420700055841).

Almost surely, 2^841400111681 is an apocalyptic number.

It is an amenable number.

841400111681 is a deficient number, since it is larger than the sum of its proper divisors (1).

841400111681 is an equidigital number, since it uses as much as digits as its factorization.

841400111681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 35.

The spelling of 841400111681 in words is "eight hundred forty-one billion, four hundred million, one hundred eleven thousand, six hundred eighty-one".