1982801191361 has 2 divisors, whose sum is σ = 1982801191362. Its totient is φ = 1982801191360.

The previous prime is 1982801191333. The next prime is 1982801191387. The reversal of 1982801191361 is 1631911082891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1178136576400 + 804664614961 = 1085420^2 + 897031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1982801191361 - 2⁶ = 1982801191297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1982801191321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991400595680 + 991400595681.

It is an arithmetic number, because the mean of its divisors is an integer number (991400595681).

Almost surely, 2^{1982801191361} is an apocalyptic number.

It is an amenable number.

1982801191361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982801191361 is an equidigital number, since it uses as much as digits as its factorization.

1982801191361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 50.

The spelling of 1982801191361 in words is "one trillion, nine hundred eighty-two billion, eight hundred one million, one hundred ninety-one thousand, three hundred sixty-one".