2065317643 has 4 divisors (see below), whose sum is σ = 2071446520. Its totient is φ = 2059188768.

The previous prime is 2065317629. The next prime is 2065317647. The reversal of 2065317643 is 3467135602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065317643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2065317647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3063933 + ... + 3064606.

It is an arithmetic number, because the mean of its divisors is an integer number (517861630).

Almost surely, 2^2065317643 is an apocalyptic number.

2065317643 is a deficient number, since it is larger than the sum of its proper divisors (6128877).

2065317643 is an equidigital number, since it uses as much as digits as its factorization.

2065317643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128876.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 2065317643 is about 45445.7659523965. The cubic root of 2065317643 is about 1273.4902325249.

The spelling of 2065317643 in words is "two billion, sixty-five million, three hundred seventeen thousand, six hundred forty-three".