320173433216540 has 12 divisors (see below), whose sum is σ = 672364209754776. Its totient is φ = 128069373286608.

The previous prime is 320173433216503. The next prime is 320173433216599. The reversal of 320173433216540 is 45612334371023.

It is a happy number.

It is a super-2 number, since 2×320173433216540² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320173433216491 and 320173433216500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8004335830394 + ... + 8004335830433.

It is an arithmetic number, because the mean of its divisors is an integer number (56030350812898).

Almost surely, 2^{320173433216540} is an apocalyptic number.

It is an amenable number.

320173433216540 is an abundant number, since it is smaller than the sum of its proper divisors (352190776538236).

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

320173433216540 is a wasteful number, since it uses less digits than its factorization.

320173433216540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16008671660836 (or 16008671660834 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 44.

Adding to 320173433216540 its reverse (45612334371023), we get a palindrome (365785767587563).

The spelling of 320173433216540 in words is "three hundred twenty trillion, one hundred seventy-three billion, four hundred thirty-three million, two hundred sixteen thousand, five hundred forty".