823641242794 has 8 divisors (see below), whose sum is σ = 1235515833828. Its totient is φ = 411802631520.

The previous prime is 823641242779. The next prime is 823641242833. The reversal of 823641242794 is 497242146328.

It can be written as a sum of positive squares in 2 ways, for example, as 738748845025 + 84892397769 = 859505^2 + 291363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8937637 + ... + 9029320.

Almost surely, 2^823641242794 is an apocalyptic number.

823641242794 is a deficient number, since it is larger than the sum of its proper divisors (411874591034).

823641242794 is a wasteful number, since it uses less digits than its factorization.

823641242794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17989880.

The product of its digits is 4644864, while the sum is 52.

The spelling of 823641242794 in words is "eight hundred twenty-three billion, six hundred forty-one million, two hundred forty-two thousand, seven hundred ninety-four".