1982081280191 has 2 divisors, whose sum is σ = 1982081280192. Its totient is φ = 1982081280190.

The previous prime is 1982081280169. The next prime is 1982081280197. The reversal of 1982081280191 is 1910821802891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1982081280191 - 2¹⁴ = 1982081263807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1982081280197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991040640095 + 991040640096.

It is an arithmetic number, because the mean of its divisors is an integer number (991040640096).

Almost surely, 2^{1982081280191} is an apocalyptic number.

1982081280191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982081280191 is an equidigital number, since it uses as much as digits as its factorization.

1982081280191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 50.

The spelling of 1982081280191 in words is "one trillion, nine hundred eighty-two billion, eighty-one million, two hundred eighty thousand, one hundred ninety-one".