1085797115181 has 24 divisors (see below), whose sum is σ = 1569807000216. Its totient is φ = 723203433600.

The previous prime is 1085797115119. The next prime is 1085797115201. The reversal of 1085797115181 is 1815117975801.

It is a happy number.

1085797115181 is a `hidden beast` number, since 1 + 0 + 8 + 57 + 9 + 71 + 1 + 518 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 638135759556 + 447661355625 = 798834^2 + 669075^2 .

It is not a de Polignac number, because 1085797115181 - 2²¹ = 1085795018029 is a prime.

It is a super-2 number, since 2×1085797115181² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085797115111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78102331 + ... + 78116231.

It is an arithmetic number, because the mean of its divisors is an integer number (65408625009).

Almost surely, 2^{1085797115181} is an apocalyptic number.

It is an amenable number.

1085797115181 is a deficient number, since it is larger than the sum of its proper divisors (484009885035).

1085797115181 is a wasteful number, since it uses less digits than its factorization.

1085797115181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213 (or 21210 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 54.

The spelling of 1085797115181 in words is "one trillion, eighty-five billion, seven hundred ninety-seven million, one hundred fifteen thousand, one hundred eighty-one".