2016678281 has 2 divisors, whose sum is σ = 2016678282. Its totient is φ = 2016678280.

The previous prime is 2016678269. The next prime is 2016678283. The reversal of 2016678281 is 1828766102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1145484025 + 871194256 = 33845^2 + 29516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2016678281 is a prime.

It is a super-2 number, since 2×2016678281² = 8133982578114229922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2016678283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2016678283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008339140 + 1008339141.

It is an arithmetic number, because the mean of its divisors is an integer number (1008339141).

Almost surely, 2^2016678281 is an apocalyptic number.

It is an amenable number.

2016678281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016678281 is an equidigital number, since it uses as much as digits as its factorization.

2016678281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 2016678281 is about 44907.4412653404. The cubic root of 2016678281 is about 1263.4135791316.

The spelling of 2016678281 in words is "two billion, sixteen million, six hundred seventy-eight thousand, two hundred eighty-one".