819745716373 has 2 divisors, whose sum is σ = 819745716374. Its totient is φ = 819745716372.

The previous prime is 819745716331. The next prime is 819745716397. The reversal of 819745716373 is 373617547918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 815802755524 + 3942960849 = 903218^2 + 62793^2 .

It is a cyclic number.

It is not a de Polignac number, because 819745716373 - 2⁹ = 819745715861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819745716313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409872858186 + 409872858187.

It is an arithmetic number, because the mean of its divisors is an integer number (409872858187).

Almost surely, 2^819745716373 is an apocalyptic number.

It is an amenable number.

819745716373 is a deficient number, since it is larger than the sum of its proper divisors (1).

819745716373 is an equidigital number, since it uses as much as digits as its factorization.

819745716373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 61.

The spelling of 819745716373 in words is "eight hundred nineteen billion, seven hundred forty-five million, seven hundred sixteen thousand, three hundred seventy-three".