256303301440369 has 2 divisors, whose sum is σ = 256303301440370. Its totient is φ = 256303301440368.

The previous prime is 256303301440357. The next prime is 256303301440463. The reversal of 256303301440369 is 963044103303652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216362329747600 + 39940971692769 = 14709260^2 + 6319887^2 .

It is a cyclic number.

It is not a de Polignac number, because 256303301440369 - 2²³ = 256303293051761 is a prime.

It is a super-2 number, since 2×256303301440369² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256303301440309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128151650720184 + 128151650720185.

It is an arithmetic number, because the mean of its divisors is an integer number (128151650720185).

Almost surely, 2^{256303301440369} is an apocalyptic number.

It is an amenable number.

256303301440369 is a deficient number, since it is larger than the sum of its proper divisors (1).

256303301440369 is an equidigital number, since it uses as much as digits as its factorization.

256303301440369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 49.

The spelling of 256303301440369 in words is "two hundred fifty-six trillion, three hundred three billion, three hundred one million, four hundred forty thousand, three hundred sixty-nine".