2040509491243 has 2 divisors, whose sum is σ = 2040509491244. Its totient is φ = 2040509491242.

The previous prime is 2040509491199. The next prime is 2040509491259. The reversal of 2040509491243 is 3421949050402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2040509491243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2040509491243.

It is not a weakly prime, because it can be changed into another prime (2040509471243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020254745621 + 1020254745622.

It is an arithmetic number, because the mean of its divisors is an integer number (1020254745622).

Almost surely, 2^{2040509491243} is an apocalyptic number.

2040509491243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040509491243 is an equidigital number, since it uses as much as digits as its factorization.

2040509491243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 2040509491243 in words is "two trillion, forty billion, five hundred nine million, four hundred ninety-one thousand, two hundred forty-three".