394578323875493 has 8 divisors (see below), whose sum is σ = 402163943074560. Its totient is φ = 387028740872880.

The previous prime is 394578323875451. The next prime is 394578323875523.

394578323875493 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 394578323875493 - 2⁸ = 394578323875237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394578323875403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9009027005 + ... + 9009070802.

It is an arithmetic number, because the mean of its divisors is an integer number (50270492884320).

Almost surely, 2^{394578323875493} is an apocalyptic number.

It is an amenable number.

394578323875493 is a deficient number, since it is larger than the sum of its proper divisors (7585619199067).

394578323875493 is a wasteful number, since it uses less digits than its factorization.

394578323875493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18018098227.

The product of its digits is 16460236800, while the sum is 80.

The spelling of 394578323875493 in words is "three hundred ninety-four trillion, five hundred seventy-eight billion, three hundred twenty-three million, eight hundred seventy-five thousand, four hundred ninety-three".