1085841109369 has 9 divisors (see below), whose sum is σ = 1109485707141. Its totient is φ = 1062690173340.

The previous prime is 1085841109337. The next prime is 1085841109393. The reversal of 1085841109369 is 9639011485801.

It is a happy number.

The square root of 1085841109369 is 1042037.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1085841109369 - 2⁵ = 1085841109337 is a prime.

It is a super-2 number, since 2×1085841109369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085841109399) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48964654 + ... + 48986824.

Almost surely, 2^{1085841109369} is an apocalyptic number.

1085841109369 is the 1042037-th square number.

1085841109369 is the 521019-th centered octagonal number.

It is an amenable number.

1085841109369 is a deficient number, since it is larger than the sum of its proper divisors (23644597772).

1085841109369 is an frugal number, since it uses more digits than its factorization.

1085841109369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44436 (or 22218 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 1085841109369 in words is "one trillion, eighty-five billion, eight hundred forty-one million, one hundred nine thousand, three hundred sixty-nine".