2256289136669 has 2 divisors, whose sum is σ = 2256289136670. Its totient is φ = 2256289136668.

The previous prime is 2256289136609. The next prime is 2256289136711. The reversal of 2256289136669 is 9666319826522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1634025324100 + 622263812569 = 1278290^2 + 788837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2256289136669 is a prime.

It is a super-2 number, since 2×2256289136669² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256289136609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128144568334 + 1128144568335.

It is an arithmetic number, because the mean of its divisors is an integer number (1128144568335).

Almost surely, 2^{2256289136669} is an apocalyptic number.

It is an amenable number.

2256289136669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256289136669 is an equidigital number, since it uses as much as digits as its factorization.

2256289136669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100776960, while the sum is 65.

The spelling of 2256289136669 in words is "two trillion, two hundred fifty-six billion, two hundred eighty-nine million, one hundred thirty-six thousand, six hundred sixty-nine".