256260530305 has 16 divisors (see below), whose sum is σ = 331224488784. Its totient is φ = 189205954560.

The previous prime is 256260530303. The next prime is 256260530329. The reversal of 256260530305 is 503035062652.

It can be written as a sum of positive squares in 8 ways, for example, as 6424503409 + 249836026896 = 80153^2 + 499836^2 .

It is not a de Polignac number, because 256260530305 - 2¹ = 256260530303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256260530303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44145 + ... + 717265.

It is an arithmetic number, because the mean of its divisors is an integer number (20701530549).

Almost surely, 2^256260530305 is an apocalyptic number.

It is an amenable number.

256260530305 is a deficient number, since it is larger than the sum of its proper divisors (74963958479).

256260530305 is a wasteful number, since it uses less digits than its factorization.

256260530305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678996.

The product of its (nonzero) digits is 162000, while the sum is 37.

Adding to 256260530305 its reverse (503035062652), we get a palindrome (759295592957).

The spelling of 256260530305 in words is "two hundred fifty-six billion, two hundred sixty million, five hundred thirty thousand, three hundred five".