2065571617 has 2 divisors, whose sum is σ = 2065571618. Its totient is φ = 2065571616.

The previous prime is 2065571591. The next prime is 2065571659. The reversal of 2065571617 is 7161755602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1955762176 + 109809441 = 44224^2 + 10479^2 .

It is a cyclic number.

It is not a de Polignac number, because 2065571617 - 2⁷ = 2065571489 is a prime.

It is a super-2 number, since 2×2065571617² = 8533172209911989378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2065571617.

It is not a weakly prime, because it can be changed into another prime (2065571017) 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, 1032785808 + 1032785809.

It is an arithmetic number, because the mean of its divisors is an integer number (1032785809).

Almost surely, 2^2065571617 is an apocalyptic number.

It is an amenable number.

2065571617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065571617 is an equidigital number, since it uses as much as digits as its factorization.

2065571617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 2065571617 is about 45448.5601202062. The cubic root of 2065571617 is about 1273.5424311383.

The spelling of 2065571617 in words is "two billion, sixty-five million, five hundred seventy-one thousand, six hundred seventeen".