1085810818669 has 2 divisors, whose sum is σ = 1085810818670. Its totient is φ = 1085810818668.

The previous prime is 1085810818661. The next prime is 1085810818709. The reversal of 1085810818669 is 9668180185801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940182336900 + 145628481769 = 969630^2 + 381613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085810818669 - 2³ = 1085810818661 is a prime.

It is a super-2 number, since 2×1085810818669² (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 (1085810818661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542905409334 + 542905409335.

It is an arithmetic number, because the mean of its divisors is an integer number (542905409335).

Almost surely, 2^{1085810818669} is an apocalyptic number.

It is an amenable number.

1085810818669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085810818669 is an equidigital number, since it uses as much as digits as its factorization.

1085810818669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 61.

The spelling of 1085810818669 in words is "one trillion, eighty-five billion, eight hundred ten million, eight hundred eighteen thousand, six hundred sixty-nine".