4010065981 has 2 divisors, whose sum is σ = 4010065982. Its totient is φ = 4010065980.

The previous prime is 4010065979. The next prime is 4010065987. The reversal of 4010065981 is 1895600104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2499500025 + 1510565956 = 49995^2 + 38866^2 .

It is a cyclic number.

It is not a de Polignac number, because 4010065981 - 2¹ = 4010065979 is a prime.

It is a super-2 number, since 2×4010065981² = 32161258343946984722, which contains 22 as substring.

Together with 4010065979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4010065987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2005032990 + 2005032991.

It is an arithmetic number, because the mean of its divisors is an integer number (2005032991).

Almost surely, 2^4010065981 is an apocalyptic number.

It is an amenable number.

4010065981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4010065981 is an equidigital number, since it uses as much as digits as its factorization.

4010065981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 4010065981 is about 63325.0817686010. The cubic root of 4010065981 is about 1588.7314989727.

The spelling of 4010065981 in words is "four billion, ten million, sixty-five thousand, nine hundred eighty-one".