819745716382 has 4 divisors (see below), whose sum is σ = 1229618574576. Its totient is φ = 409872858190.

The previous prime is 819745716373. The next prime is 819745716397. The reversal of 819745716382 is 283617547918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 283617547918 = 2 ⋅141808773959.

It is a self number, because there is not a number n which added to its sum of digits gives 819745716382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204936429094 + ... + 204936429097.

It is an arithmetic number, because the mean of its divisors is an integer number (307404643644).

Almost surely, 2^819745716382 is an apocalyptic number.

819745716382 is a deficient number, since it is larger than the sum of its proper divisors (409872858194).

819745716382 is a wasteful number, since it uses less digits than its factorization.

819745716382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409872858193.

The product of its digits is 20321280, while the sum is 61.

The spelling of 819745716382 in words is "eight hundred nineteen billion, seven hundred forty-five million, seven hundred sixteen thousand, three hundred eighty-two".