320705452861 has 4 divisors (see below), whose sum is σ = 323702700192. Its totient is φ = 317708205532.

The previous prime is 320705452801. The next prime is 320705452913. The reversal of 320705452861 is 168254507023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 168254507023 = 5557 ⋅30277939.

It is a cyclic number.

It is not a de Polignac number, because 320705452861 - 2³³ = 312115518269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320705452801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498623505 + ... + 1498623718.

It is an arithmetic number, because the mean of its divisors is an integer number (80925675048).

Almost surely, 2^320705452861 is an apocalyptic number.

It is an amenable number.

320705452861 is a deficient number, since it is larger than the sum of its proper divisors (2997247331).

320705452861 is a wasteful number, since it uses less digits than its factorization.

320705452861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997247330.

The product of its (nonzero) digits is 403200, while the sum is 43.

Adding to 320705452861 its reverse (168254507023), we get a palindrome (488959959884).

The spelling of 320705452861 in words is "three hundred twenty billion, seven hundred five million, four hundred fifty-two thousand, eight hundred sixty-one".