1920068782441 has 2 divisors, whose sum is σ = 1920068782442. Its totient is φ = 1920068782440.

The previous prime is 1920068782409. The next prime is 1920068782447. The reversal of 1920068782441 is 1442878600291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1889800090000 + 30268692441 = 1374700^2 + 173979^2 .

It is an emirp because it is prime and its reverse (1442878600291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920068782441 - 2⁵ = 1920068782409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1920068782447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960034391220 + 960034391221.

It is an arithmetic number, because the mean of its divisors is an integer number (960034391221).

Almost surely, 2^{1920068782441} is an apocalyptic number.

It is an amenable number.

1920068782441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920068782441 is an equidigital number, since it uses as much as digits as its factorization.

1920068782441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 1920068782441 in words is "one trillion, nine hundred twenty billion, sixty-eight million, seven hundred eighty-two thousand, four hundred forty-one".