320494388359599 has 16 divisors (see below), whose sum is σ = 474807002995200. Its totient is φ = 213662699798328.

The previous prime is 320494388359583. The next prime is 320494388359667. The reversal of 320494388359599 is 995953883494023.

It is a happy number.

320494388359599 is a `hidden beast` number, since 3 + 2 + 0 + 4 + 9 + 438 + 8 + 3 + 5 + 95 + 99 = 666.

It is not a de Polignac number, because 320494388359599 - 2⁴ = 320494388359583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320494388359559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22084252 + ... + 33596174.

It is an arithmetic number, because the mean of its divisors is an integer number (29675437687200).

Almost surely, 2^{320494388359599} is an apocalyptic number.

320494388359599 is a deficient number, since it is larger than the sum of its proper divisors (154312614635601).

320494388359599 is a wasteful number, since it uses less digits than its factorization.

320494388359599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543051 (or 12543045 counting only the distinct ones).

The product of its (nonzero) digits is 9069926400, while the sum is 81.

The spelling of 320494388359599 in words is "three hundred twenty trillion, four hundred ninety-four billion, three hundred eighty-eight million, three hundred fifty-nine thousand, five hundred ninety-nine".