256612226146513 has 2 divisors, whose sum is σ = 256612226146514. Its totient is φ = 256612226146512.

The previous prime is 256612226146477. The next prime is 256612226146547. The reversal of 256612226146513 is 315641622216652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206476437626944 + 50135788519569 = 14369288^2 + 7080663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256612226146513 is a prime.

It is not a weakly prime, because it can be changed into another prime (256612226146013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128306113073256 + 128306113073257.

It is an arithmetic number, because the mean of its divisors is an integer number (128306113073257).

Almost surely, 2^{256612226146513} is an apocalyptic number.

It is an amenable number.

256612226146513 is a deficient number, since it is larger than the sum of its proper divisors (1).

256612226146513 is an equidigital number, since it uses as much as digits as its factorization.

256612226146513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 52.

The spelling of 256612226146513 in words is "two hundred fifty-six trillion, six hundred twelve billion, two hundred twenty-six million, one hundred forty-six thousand, five hundred thirteen".