2256664315361 has 2 divisors, whose sum is σ = 2256664315362. Its totient is φ = 2256664315360.

The previous prime is 2256664315351. The next prime is 2256664315403. The reversal of 2256664315361 is 1635134666522.

2256664315361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1989070198336 + 267594117025 = 1410344^2 + 517295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2256664315361 is a prime.

It is not a weakly prime, because it can be changed into another prime (2256664315351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128332157680 + 1128332157681.

It is an arithmetic number, because the mean of its divisors is an integer number (1128332157681).

Almost surely, 2^{2256664315361} is an apocalyptic number.

It is an amenable number.

2256664315361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256664315361 is an equidigital number, since it uses as much as digits as its factorization.

2256664315361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 50.

The spelling of 2256664315361 in words is "two trillion, two hundred fifty-six billion, six hundred sixty-four million, three hundred fifteen thousand, three hundred sixty-one".