256613032730123 has 2 divisors, whose sum is σ = 256613032730124. Its totient is φ = 256613032730122.

The previous prime is 256613032730107. The next prime is 256613032730141. The reversal of 256613032730123 is 321037230316652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256613032730123 - 2⁴ = 256613032730107 is a prime.

It is a super-3 number, since 3×256613032730123³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (256613032732123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128306516365061 + 128306516365062.

It is an arithmetic number, because the mean of its divisors is an integer number (128306516365062).

Almost surely, 2^{256613032730123} is an apocalyptic number.

256613032730123 is a deficient number, since it is larger than the sum of its proper divisors (1).

256613032730123 is an equidigital number, since it uses as much as digits as its factorization.

256613032730123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 44.

The spelling of 256613032730123 in words is "two hundred fifty-six trillion, six hundred thirteen billion, thirty-two million, seven hundred thirty thousand, one hundred twenty-three".