2081780871799 has 2 divisors, whose sum is σ = 2081780871800. Its totient is φ = 2081780871798.

The previous prime is 2081780871773. The next prime is 2081780871803. The reversal of 2081780871799 is 9971780871802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2081780871799 - 2⁵ = 2081780871767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081780571799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040890435899 + 1040890435900.

It is an arithmetic number, because the mean of its divisors is an integer number (1040890435900).

Almost surely, 2^{2081780871799} is an apocalyptic number.

2081780871799 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081780871799 is an equidigital number, since it uses as much as digits as its factorization.

2081780871799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28449792, while the sum is 67.

The spelling of 2081780871799 in words is "two trillion, eighty-one billion, seven hundred eighty million, eight hundred seventy-one thousand, seven hundred ninety-nine".