1978833833797 has 2 divisors, whose sum is σ = 1978833833798. Its totient is φ = 1978833833796.

The previous prime is 1978833833777. The next prime is 1978833833803. The reversal of 1978833833797 is 7973383388791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1487263177156 + 491570656641 = 1219534^2 + 701121^2 .

It is an emirp because it is prime and its reverse (7973383388791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1978833833797 - 2²³ = 1978825445189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1978833833707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989416916898 + 989416916899.

It is an arithmetic number, because the mean of its divisors is an integer number (989416916899).

Almost surely, 2^{1978833833797} is an apocalyptic number.

It is an amenable number.

1978833833797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1978833833797 is an equidigital number, since it uses as much as digits as its factorization.

1978833833797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152216576, while the sum is 76.

The spelling of 1978833833797 in words is "one trillion, nine hundred seventy-eight billion, eight hundred thirty-three million, eight hundred thirty-three thousand, seven hundred ninety-seven".