256020322163 has 4 divisors (see below), whose sum is σ = 256993783728. Its totient is φ = 255046860600.

The previous prime is 256020322147. The next prime is 256020322177. The reversal of 256020322163 is 361223020652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256020322163 - 2⁴ = 256020322147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256020321163) 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, 486730388 + ... + 486730913.

It is an arithmetic number, because the mean of its divisors is an integer number (64248445932).

Almost surely, 2^256020322163 is an apocalyptic number.

256020322163 is a deficient number, since it is larger than the sum of its proper divisors (973461565).

256020322163 is an equidigital number, since it uses as much as digits as its factorization.

256020322163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973461564.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 256020322163 in words is "two hundred fifty-six billion, twenty million, three hundred twenty-two thousand, one hundred sixty-three".