320011072805 has 4 divisors (see below), whose sum is σ = 384013287372. Its totient is φ = 256008858240.

The previous prime is 320011072691. The next prime is 320011072807. The reversal of 320011072805 is 508270110023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508270110023 = 13 ⋅39097700771.

It can be written as a sum of positive squares in 2 ways, for example, as 64316003236 + 255695069569 = 253606^2 + 505663^2 .

It is not a de Polignac number, because 320011072805 - 2¹² = 320011068709 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 (320011072807) 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, 32001107276 + ... + 32001107285.

It is an arithmetic number, because the mean of its divisors is an integer number (96003321843).

Almost surely, 2^320011072805 is an apocalyptic number.

It is an amenable number.

320011072805 is a deficient number, since it is larger than the sum of its proper divisors (64002214567).

320011072805 is an equidigital number, since it uses as much as digits as its factorization.

320011072805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64002214566.

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 320011072805 its reverse (508270110023), we get a palindrome (828281182828).

The spelling of 320011072805 in words is "three hundred twenty billion, eleven million, seventy-two thousand, eight hundred five".