2016115891 has 2 divisors, whose sum is σ = 2016115892. Its totient is φ = 2016115890.

The previous prime is 2016115861. The next prime is 2016115943. The reversal of 2016115891 is 1985116102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2016115891 - 2⁷ = 2016115763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2016115831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008057945 + 1008057946.

It is an arithmetic number, because the mean of its divisors is an integer number (1008057946).

Almost surely, 2^2016115891 is an apocalyptic number.

2016115891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016115891 is an equidigital number, since it uses as much as digits as its factorization.

2016115891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 34.

The square root of 2016115891 is about 44901.1791715986. The cubic root of 2016115891 is about 1263.2961257219.

The spelling of 2016115891 in words is "two billion, sixteen million, one hundred fifteen thousand, eight hundred ninety-one".