320056660423581 has 4 divisors (see below), whose sum is σ = 426742213898112. Its totient is φ = 213371106949052.

The previous prime is 320056660423579. The next prime is 320056660423589. The reversal of 320056660423581 is 185324066650023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320056660423581 - 2¹ = 320056660423579 is a prime.

It is a super-2 number, since 2×320056660423581² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320056660423589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53342776737261 + ... + 53342776737266.

It is an arithmetic number, because the mean of its divisors is an integer number (106685553474528).

Almost surely, 2^{320056660423581} is an apocalyptic number.

It is an amenable number.

320056660423581 is a deficient number, since it is larger than the sum of its proper divisors (106685553474531).

320056660423581 is a wasteful number, since it uses less digits than its factorization.

320056660423581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106685553474530.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 320056660423581 in words is "three hundred twenty trillion, fifty-six billion, six hundred sixty million, four hundred twenty-three thousand, five hundred eighty-one".