819593008994 has 4 divisors (see below), whose sum is σ = 1229389513494. Its totient is φ = 409796504496.

The previous prime is 819593008981. The next prime is 819593009033. The reversal of 819593008994 is 499800395918.

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

It can be written as a sum of positive squares in only one way, i.e., 418667232025 + 400925776969 = 647045^2 + 633187^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 819593008994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204898252247 + ... + 204898252250.

Almost surely, 2^819593008994 is an apocalyptic number.

819593008994 is a deficient number, since it is larger than the sum of its proper divisors (409796504500).

819593008994 is a wasteful number, since it uses less digits than its factorization.

819593008994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409796504499.

The product of its (nonzero) digits is 25194240, while the sum is 65.

The spelling of 819593008994 in words is "eight hundred nineteen billion, five hundred ninety-three million, eight thousand, nine hundred ninety-four".