2065397340643 has 32 divisors (see below), whose sum is σ = 2596429946880. Its totient is φ = 1599196020480.

The previous prime is 2065397340623. The next prime is 2065397340683. The reversal of 2065397340643 is 3460437935602.

It is a cyclic number.

It is not a de Polignac number, because 2065397340643 - 2⁹ = 2065397340131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2065397340623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42056863 + ... + 42105943.

It is an arithmetic number, because the mean of its divisors is an integer number (81138435840).

Almost surely, 2^{2065397340643} is an apocalyptic number.

2065397340643 is a deficient number, since it is larger than the sum of its proper divisors (531032606237).

2065397340643 is a wasteful number, since it uses less digits than its factorization.

2065397340643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58987.

The product of its (nonzero) digits is 9797760, while the sum is 52.

The spelling of 2065397340643 in words is "two trillion, sixty-five billion, three hundred ninety-seven million, three hundred forty thousand, six hundred forty-three".