256613213073303 has 8 divisors (see below), whose sum is σ = 380167723071600. Its totient is φ = 171075475382184.

The previous prime is 256613213073293. The next prime is 256613213073353. The reversal of 256613213073303 is 303370312316652.

256613213073303 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 1 + 3 + 2 + 1 + 307 + 330 + 3 = 666.

It is not a de Polignac number, because 256613213073303 - 2⁸ = 256613213073047 is a prime.

It is a super-2 number, since 2×256613213073303² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256613213073353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4752096538368 + ... + 4752096538421.

It is an arithmetic number, because the mean of its divisors is an integer number (47520965383950).

Almost surely, 2^{256613213073303} is an apocalyptic number.

256613213073303 is a deficient number, since it is larger than the sum of its proper divisors (123554509998297).

256613213073303 is an equidigital number, since it uses as much as digits as its factorization.

256613213073303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9504193076798 (or 9504193076792 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 45.

Adding to 256613213073303 its reverse (303370312316652), we get a palindrome (559983525389955).

The spelling of 256613213073303 in words is "two hundred fifty-six trillion, six hundred thirteen billion, two hundred thirteen million, seventy-three thousand, three hundred three".