111840847871 has 2 divisors, whose sum is σ = 111840847872. Its totient is φ = 111840847870.

The previous prime is 111840847849. The next prime is 111840847891. The reversal of 111840847871 is 178748048111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111840847871 - 2¹⁰ = 111840846847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111840847891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55920423935 + 55920423936.

It is an arithmetic number, because the mean of its divisors is an integer number (55920423936).

Almost surely, 2^111840847871 is an apocalyptic number.

111840847871 is a deficient number, since it is larger than the sum of its proper divisors (1).

111840847871 is an equidigital number, since it uses as much as digits as its factorization.

111840847871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 401408, while the sum is 50.

The spelling of 111840847871 in words is "one hundred eleven billion, eight hundred forty million, eight hundred forty-seven thousand, eight hundred seventy-one".