2256155022409 has 2 divisors, whose sum is σ = 2256155022410. Its totient is φ = 2256155022408.

The previous prime is 2256155022397. The next prime is 2256155022481. The reversal of 2256155022409 is 9042205516522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2171284766784 + 84870255625 = 1473528^2 + 291325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256155022409 - 2⁷ = 2256155022281 is a prime.

It is not a weakly prime, because it can be changed into another prime (2256155032409) 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, 1128077511204 + 1128077511205.

It is an arithmetic number, because the mean of its divisors is an integer number (1128077511205).

Almost surely, 2^{2256155022409} is an apocalyptic number.

It is an amenable number.

2256155022409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256155022409 is an equidigital number, since it uses as much as digits as its factorization.

2256155022409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 2256155022409 in words is "two trillion, two hundred fifty-six billion, one hundred fifty-five million, twenty-two thousand, four hundred nine".