320546742553 has 8 divisors (see below), whose sum is σ = 345647322720. Its totient is φ = 296269132320.

The previous prime is 320546742533. The next prime is 320546742623. The reversal of 320546742553 is 355247645023.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320546742553 is a prime.

It is a super-2 number, since 2×320546742553² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320546742533) 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, 205741675 + ... + 205743232.

It is an arithmetic number, because the mean of its divisors is an integer number (43205915340).

Almost surely, 2^320546742553 is an apocalyptic number.

It is an amenable number.

320546742553 is a deficient number, since it is larger than the sum of its proper divisors (25100580167).

320546742553 is a wasteful number, since it uses less digits than its factorization.

320546742553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411484967.

The product of its (nonzero) digits is 3024000, while the sum is 46.

The spelling of 320546742553 in words is "three hundred twenty billion, five hundred forty-six million, seven hundred forty-two thousand, five hundred fifty-three".