1856116111 has 2 divisors, whose sum is σ = 1856116112. Its totient is φ = 1856116110.

The previous prime is 1856116051. The next prime is 1856116133. The reversal of 1856116111 is 1116116581.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1856116111 - 2¹¹ = 1856114063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1856116181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928058055 + 928058056.

It is an arithmetic number, because the mean of its divisors is an integer number (928058056).

Almost surely, 2^1856116111 is an apocalyptic number.

1856116111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856116111 is an equidigital number, since it uses as much as digits as its factorization.

1856116111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 31.

The square root of 1856116111 is about 43082.6660154638. Note that the first 3 decimals coincide. The cubic root of 1856116111 is about 1228.9523568792.

The spelling of 1856116111 in words is "one billion, eight hundred fifty-six million, one hundred sixteen thousand, one hundred eleven".