320494388359680 has 160 divisors (see below), whose sum is σ = 1138422775564800. Its totient is φ = 85465170210816.

The previous prime is 320494388359667. The next prime is 320494388359771. The reversal of 320494388359680 is 86953883494023.

It is a happy number.

320494388359680 is a `hidden beast` number, since 3 + 2 + 0 + 4 + 9 + 438 + 83 + 59 + 68 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 320494388359599 and 320494388359608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2318322000 + ... + 2318460239.

It is an arithmetic number, because the mean of its divisors is an integer number (7115142347280).

Almost surely, 2^{320494388359680} is an apocalyptic number.

320494388359680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320494388359680 is an abundant number, since it is smaller than the sum of its proper divisors (817928387205120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320494388359680 is an equidigital number, since it uses as much as digits as its factorization.

320494388359680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636782271 (or 4636782249 counting only the distinct ones).

The product of its (nonzero) digits is 1074954240, while the sum is 72.

The spelling of 320494388359680 in words is "three hundred twenty trillion, four hundred ninety-four billion, three hundred eighty-eight million, three hundred fifty-nine thousand, six hundred eighty".