320461273889 has 4 divisors (see below), whose sum is σ = 320468567856. Its totient is φ = 320453979924.

The previous prime is 320461273879. The next prime is 320461273921. The reversal of 320461273889 is 988372164023.

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: 988372164023 = 31 ⋅31882973033.

It is a cyclic number.

It is not a de Polignac number, because 320461273889 - 2⁸ = 320461273633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320461273889.

It is not an unprimeable number, because it can be changed into a prime (320461273819) 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, 3580679 + ... + 3669084.

It is an arithmetic number, because the mean of its divisors is an integer number (80117141964).

Almost surely, 2^320461273889 is an apocalyptic number.

It is an amenable number.

320461273889 is a deficient number, since it is larger than the sum of its proper divisors (7293967).

320461273889 is an equidigital number, since it uses as much as digits as its factorization.

320461273889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7293966.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 320461273889 in words is "three hundred twenty billion, four hundred sixty-one million, two hundred seventy-three thousand, eight hundred eighty-nine".