819876840464774 has 4 divisors (see below), whose sum is σ = 1229815260697164. Its totient is φ = 409938420232386.

The previous prime is 819876840464677. The next prime is 819876840464807. The reversal of 819876840464774 is 477464048678918.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 819876840464692 and 819876840464701.

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, 204969210116192 + ... + 204969210116195.

It is an arithmetic number, because the mean of its divisors is an integer number (307453815174291).

Almost surely, 2^{819876840464774} is an apocalyptic number.

819876840464774 is a deficient number, since it is larger than the sum of its proper divisors (409938420232390).

819876840464774 is a wasteful number, since it uses less digits than its factorization.

819876840464774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409938420232389.

The product of its (nonzero) digits is 14566293504, while the sum is 83.

The spelling of 819876840464774 in words is "eight hundred nineteen trillion, eight hundred seventy-six billion, eight hundred forty million, four hundred sixty-four thousand, seven hundred seventy-four".