1255055440321 has 2 divisors, whose sum is σ = 1255055440322. Its totient is φ = 1255055440320.

The previous prime is 1255055440307. The next prime is 1255055440351. The reversal of 1255055440321 is 1230445505521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1161137708721 + 93917731600 = 1077561^2 + 306460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255055440321 - 2¹⁵ = 1255055407553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255055440351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627527720160 + 627527720161.

It is an arithmetic number, because the mean of its divisors is an integer number (627527720161).

Almost surely, 2^{1255055440321} is an apocalyptic number.

It is an amenable number.

1255055440321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255055440321 is an equidigital number, since it uses as much as digits as its factorization.

1255055440321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 1255055440321 in words is "one trillion, two hundred fifty-five billion, fifty-five million, four hundred forty thousand, three hundred twenty-one".