4102065581 has 2 divisors, whose sum is σ = 4102065582. Its totient is φ = 4102065580.

The previous prime is 4102065551. The next prime is 4102065593. The reversal of 4102065581 is 1855602014.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3898004356 + 204061225 = 62434^2 + 14285^2 .

It is a cyclic number.

It is not a de Polignac number, because 4102065581 - 2¹⁴ = 4102049197 is a prime.

It is a super-2 number, since 2×4102065581² = 33653884061649735122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4102065521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051032790 + 2051032791.

It is an arithmetic number, because the mean of its divisors is an integer number (2051032791).

Almost surely, 2^4102065581 is an apocalyptic number.

It is an amenable number.

4102065581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4102065581 is an equidigital number, since it uses as much as digits as its factorization.

4102065581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 4102065581 is about 64047.3698210941. The cubic root of 4102065581 is about 1600.7893996588.

Adding to 4102065581 its reverse (1855602014), we get a palindrome (5957667595).

It can be divided in two parts, 41020 and 65581, that added together give a palindrome (106601).

The spelling of 4102065581 in words is "four billion, one hundred two million, sixty-five thousand, five hundred eighty-one".