320409773188394 has 4 divisors (see below), whose sum is σ = 480614659782594. Its totient is φ = 160204886594196.

The previous prime is 320409773188391. The next prime is 320409773188423. The reversal of 320409773188394 is 493881377904023.

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., 303305039079025 + 17104734109369 = 17415655^2 + 4135787^2 .

It is not an unprimeable number, because it can be changed into a prime (320409773188391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80102443297097 + ... + 80102443297100.

Almost surely, 2^{320409773188394} is an apocalyptic number.

320409773188394 is a deficient number, since it is larger than the sum of its proper divisors (160204886594200).

320409773188394 is a wasteful number, since it uses less digits than its factorization.

320409773188394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160204886594199.

The product of its (nonzero) digits is 219469824, while the sum is 68.

The spelling of 320409773188394 in words is "three hundred twenty trillion, four hundred nine billion, seven hundred seventy-three million, one hundred eighty-eight thousand, three hundred ninety-four".