2016020599981 has 2 divisors, whose sum is σ = 2016020599982. Its totient is φ = 2016020599980.

The previous prime is 2016020599961. The next prime is 2016020600023. The reversal of 2016020599981 is 1899950206102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2009119144356 + 6901455625 = 1417434^2 + 83075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2016020599981 - 2²⁹ = 2015483729069 is a prime.

It is a super-2 number, since 2×2016020599981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2016020599961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1008010299990 + 1008010299991.

It is an arithmetic number, because the mean of its divisors is an integer number (1008010299991).

Almost surely, 2^{2016020599981} is an apocalyptic number.

It is an amenable number.

2016020599981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2016020599981 is an equidigital number, since it uses as much as digits as its factorization.

2016020599981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 2016020599981 in words is "two trillion, sixteen billion, twenty million, five hundred ninety-nine thousand, nine hundred eighty-one".