1081685115361 has 4 divisors (see below), whose sum is σ = 1081688660500. Its totient is φ = 1081681570224.

The previous prime is 1081685115359. The next prime is 1081685115377. The reversal of 1081685115361 is 1635115861801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 359227614736 + 722457500625 = 599356^2 + 849975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081685115361 - 2¹ = 1081685115359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081685115311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266786 + ... + 1941163.

It is an arithmetic number, because the mean of its divisors is an integer number (270422165125).

Almost surely, 2^{1081685115361} is an apocalyptic number.

It is an amenable number.

1081685115361 is a deficient number, since it is larger than the sum of its proper divisors (3545139).

1081685115361 is an equidigital number, since it uses as much as digits as its factorization.

1081685115361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3545138.

The product of its (nonzero) digits is 172800, while the sum is 46.

The spelling of 1081685115361 in words is "one trillion, eighty-one billion, six hundred eighty-five million, one hundred fifteen thousand, three hundred sixty-one".