2016105881 has 2 divisors, whose sum is σ = 2016105882. Its totient is φ = 2016105880.

The previous prime is 2016105853. The next prime is 2016105893. The reversal of 2016105881 is 1885016102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2010625600 + 5480281 = 44840^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2016105881 - 2³⁰ = 942364057 is a prime.

It is a super-2 number, since 2×2016105881² = 8129365846805572322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2016105811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008052940 + 1008052941.

It is an arithmetic number, because the mean of its divisors is an integer number (1008052941).

Almost surely, 2^2016105881 is an apocalyptic number.

It is an amenable number.

2016105881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016105881 is an equidigital number, since it uses as much as digits as its factorization.

2016105881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 2016105881 is about 44901.0677044544. The cubic root of 2016105881 is about 1263.2940349665.

The spelling of 2016105881 in words is "two billion, sixteen million, one hundred five thousand, eight hundred eighty-one".