1081663826669 has 2 divisors, whose sum is σ = 1081663826670. Its totient is φ = 1081663826668.

The previous prime is 1081663826627. The next prime is 1081663826693. The reversal of 1081663826669 is 9666283661801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 801016050025 + 280647776644 = 894995^2 + 529762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081663826669 - 2³⁶ = 1012944349933 is a prime.

It is a super-2 number, since 2×1081663826669² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081663826609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540831913334 + 540831913335.

It is an arithmetic number, because the mean of its divisors is an integer number (540831913335).

Almost surely, 2^{1081663826669} is an apocalyptic number.

It is an amenable number.

1081663826669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081663826669 is an equidigital number, since it uses as much as digits as its factorization.

1081663826669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26873856, while the sum is 62.

The spelling of 1081663826669 in words is "one trillion, eighty-one billion, six hundred sixty-three million, eight hundred twenty-six thousand, six hundred sixty-nine".