4045705981 has 2 divisors, whose sum is σ = 4045705982. Its totient is φ = 4045705980.

The previous prime is 4045705949. The next prime is 4045705991. The reversal of 4045705981 is 1895075404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3009509881 + 1036196100 = 54859^2 + 32190^2 .

It is a cyclic number.

It is not a de Polignac number, because 4045705981 - 2⁵ = 4045705949 is a prime.

It is a super-2 number, since 2×4045705981² = 32735473769398344722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4045705901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022852990 + 2022852991.

It is an arithmetic number, because the mean of its divisors is an integer number (2022852991).

Almost surely, 2^4045705981 is an apocalyptic number.

It is an amenable number.

4045705981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4045705981 is an equidigital number, since it uses as much as digits as its factorization.

4045705981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 4045705981 is about 63605.8643601359. The cubic root of 4045705981 is about 1593.4243118348.

The spelling of 4045705981 in words is "four billion, forty-five million, seven hundred five thousand, nine hundred eighty-one".