1745198783969 has 2 divisors, whose sum is σ = 1745198783970. Its totient is φ = 1745198783968.

The previous prime is 1745198783947. The next prime is 1745198784031. The reversal of 1745198783969 is 9693878915471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082041004944 + 663157779025 = 1040212^2 + 814345^2 .

It is an emirp because it is prime and its reverse (9693878915471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1745198783969 - 2²⁴ = 1745182006753 is a prime.

It is a super-2 number, since 2×1745198783969² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1745198783969.

It is not a weakly prime, because it can be changed into another prime (1745198783929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 872599391984 + 872599391985.

It is an arithmetic number, because the mean of its divisors is an integer number (872599391985).

Almost surely, 2^{1745198783969} is an apocalyptic number.

It is an amenable number.

1745198783969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1745198783969 is an equidigital number, since it uses as much as digits as its factorization.

1745198783969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 823011840, while the sum is 77.

The spelling of 1745198783969 in words is "one trillion, seven hundred forty-five billion, one hundred ninety-eight million, seven hundred eighty-three thousand, nine hundred sixty-nine".